Coming Soon
250 Class Features by Year
| 1980 |
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| 1981 |
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| 1982 |
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| 1983 |
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| 1984 |
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X |
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| 1985 |
X |
X |
X |
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| 1986 |
X |
X |
X |
X |
X |
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| 1987 |
X |
X |
X |
X |
X |
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| 1988 |
X |
X |
X |
X |
X |
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| 1989 |
X |
X |
X |
X |
X |
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| 1990 |
X |
X |
X |
X |
X |
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| 1991 |
X |
X |
X |
X |
X |
X |
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| 1992 |
X |
X |
X |
X |
X |
X |
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| 1993 |
X |
X |
X |
X |
X |
X |
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| 1994 |
X |
X |
X |
X |
X |
X |
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| 1995 |
X |
X |
X |
X |
X |
X |
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| 1996 |
X |
X |
X |
X |
X |
X |
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| 1997 |
X |
X |
X |
X |
X |
X |
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| 1998 |
X |
X |
X |
X |
X |
X |
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| 1999 |
X |
X |
X |
X |
X |
X |
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| 2000 |
X |
X |
X |
X |
X |
X |
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X |
| 2001 |
X |
X |
X |
X |
X |
X |
|
X |
| 2002 |
X |
X |
X |
X |
X |
X |
|
X |
| 2003 |
X |
X |
X |
X |
X |
X |
|
X |
| 2004 |
X |
X |
X |
X |
X |
X |
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X |
| 2005 |
X |
X |
X |
X |
X |
X |
|
X |
| 2006 |
X |
X |
X |
X |
X |
X |
|
X |
| 2007 |
X |
X |
X |
X |
X |
X |
|
X |
| 1980 |
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| 1981 |
X |
X |
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| 1982 |
X |
X |
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| 1983 |
X |
X |
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| 1984 |
X |
X |
X |
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X |
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| 1985 |
X |
X |
X |
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X |
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| 1986 |
X |
X |
X |
|
X |
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| 1987 |
X |
X |
X |
X |
X |
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| 1988 |
X |
X |
X |
X |
X |
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| 1989 |
X |
X |
X |
X |
X |
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| 1990 |
X |
X |
X |
X |
X |
X |
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| 1991 |
X |
X |
X |
X |
X |
X |
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| 1992 |
X |
X |
X |
X |
X |
X |
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| 1993 |
X |
X |
X |
X |
X |
X |
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| 1994 |
X |
X |
X |
X |
X |
X |
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| 1995 |
X |
X |
X |
X |
X |
X |
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| 1996 |
X |
X |
X |
X |
X |
X |
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| 1997 |
X |
X |
X |
X |
X |
X |
X |
X |
| 1998 |
X |
X |
X |
X |
X |
X |
X |
X |
| 1999 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2000 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2001 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2002 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2003 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2004 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2005 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2006 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2007 |
X |
X |
X |
X |
X |
X |
X |
X |
| 1980 |
X |
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| 1981 |
X |
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| 1982 |
X |
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X |
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| 1983 |
X |
X |
X |
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| 1984 |
X |
X |
X |
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| 1985 |
X |
X |
X |
|
X |
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| 1986 |
X |
X |
X |
X |
X |
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| 1987 |
X |
X |
X |
X |
X |
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| 1988 |
X |
X |
X |
X |
X |
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| 1989 |
X |
X |
X |
X |
X |
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| 1990 |
X |
X |
X |
X |
X |
X |
|
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| 1991 |
X |
X |
X |
X |
X |
X |
|
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| 1992 |
X |
X |
X |
X |
X |
X |
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| 1993 |
X |
X |
X |
X |
X |
X |
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| 1994 |
X |
X |
X |
X |
X |
X |
|
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| 1995 |
X |
X |
X |
X |
X |
X |
|
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| 1996 |
X |
X |
X |
X |
X |
X |
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| 1997 |
X |
X |
X |
X |
X |
X |
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| 1998 |
X |
X |
X |
X |
X |
X |
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| 1999 |
X |
X |
X |
X |
X |
X |
|
X |
| 2000 |
X |
X |
X |
X |
X |
X |
|
X |
| 2001 |
X |
X |
X |
X |
X |
X |
|
X |
| 2002 |
X |
X |
X |
X |
X |
X |
|
X |
| 2003 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2004 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2005 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2006 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2007 |
X |
X |
X |
X |
X |
X |
X |
X |
| 1980 |
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| 1981 |
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| 1982 |
X |
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| 1983 |
X |
X |
X |
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| 1984 |
X |
X |
X |
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| 1985 |
X |
X |
X |
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| 1986 |
X |
X |
X |
X |
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| 1987 |
X |
X |
X |
X |
|
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| 1988 |
X |
X |
X |
X |
X |
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| 1989 |
X |
X |
X |
X |
X |
|
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| 1990 |
X |
X |
X |
X |
X |
|
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| 1991 |
X |
X |
X |
X |
X |
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| 1992 |
X |
X |
X |
X |
X |
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| 1993 |
X |
X |
X |
X |
X |
X |
|
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| 1994 |
X |
X |
X |
X |
X |
X |
|
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| 1995 |
X |
X |
X |
X |
X |
X |
|
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| 1996 |
X |
X |
X |
X |
X |
X |
|
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| 1997 |
|
X |
X |
X |
X |
X |
|
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| 1998 |
|
X |
X |
X |
X |
X |
|
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| 1999 |
|
X |
X |
X |
X |
X |
|
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| 2000 |
|
X |
X |
X |
X |
X |
|
X |
| 2001 |
|
X |
X |
X |
X |
X |
|
X |
| 2002 |
|
X |
X |
X |
X |
X |
|
X |
| 2003 |
|
X |
X |
X |
X |
X |
|
X |
| 2004 |
|
X |
X |
X |
X |
X |
|
X |
| 2005 |
|
X |
X |
X |
X |
X |
|
X |
| 2006 |
|
X |
X |
X |
X |
X |
|
X |
| 2007 |
|
X |
X |
X |
X |
X |
|
X |
| 1980 |
|
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| 1981 |
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| 1982 |
X |
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| 1983 |
X |
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| 1984 |
X |
X |
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| 1985 |
X |
X |
X |
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| 1986 |
X |
X |
X |
X |
X |
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| 1987 |
X |
X |
X |
X |
X |
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| 1988 |
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| 1989 |
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| 1990 |
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| 1991 |
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| 1992 |
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| 1993 |
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| 1994 |
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| 1995 |
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| 1996 |
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| 1997 |
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| 1998 |
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| 1999 |
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| 2000 |
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| 2001 |
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| 2002 |
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| 2003 |
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| 2004 |
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| 2005 |
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| 2006 |
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| 2007 |
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| 1980 |
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| 1981 |
X |
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| 1982 |
X |
X |
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| 1983 |
X |
X |
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| 1984 |
X |
X |
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| 1985 |
X |
X |
X |
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| 1986 |
X |
X |
X |
|
X |
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| 1987 |
X |
X |
X |
|
X |
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|
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| 1988 |
X |
X |
X |
X |
X |
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| 1989 |
X |
X |
X |
X |
X |
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| 1990 |
X |
X |
X |
X |
X |
X |
|
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| 1991 |
X |
X |
X |
X |
X |
X |
|
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| 1992 |
X |
X |
X |
X |
X |
X |
|
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| 1993 |
X |
X |
X |
X |
X |
X |
|
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| 1994 |
X |
X |
X |
X |
X |
X |
|
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| 1995 |
X |
X |
X |
X |
X |
X |
|
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| 1996 |
X |
X |
X |
X |
X |
X |
|
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| 1997 |
X |
X |
X |
X |
X |
X |
|
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| 1998 |
X |
X |
X |
X |
X |
X |
|
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| 1999 |
X |
X |
X |
X |
X |
X |
|
X |
| 2000 |
X |
X |
X |
X |
X |
X |
|
X |
| 2001 |
X |
X |
X |
X |
X |
X |
|
X |
| 2002 |
X |
X |
X |
X |
X |
X |
|
X |
| 2003 |
X |
X |
X |
X |
X |
X |
|
X |
| 2004 |
X |
X |
X |
X |
X |
X |
|
X |
| 2005 |
X |
X |
X |
X |
X |
X |
|
X |
| 2006 |
X |
X |
X |
X |
X |
X |
|
X |
| 2007 |
X |
X |
X |
X |
X |
X |
|
X |
| 1980 |
|
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| 1981 |
|
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| 1982 |
X |
X |
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X |
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| 1983 |
X |
X |
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X |
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| 1984 |
X |
X |
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|
X |
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| 1985 |
X |
X |
X |
|
X |
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| 1986 |
X |
X |
X |
|
X |
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| 1987 |
X |
X |
X |
|
X |
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| 1988 |
X |
X |
X |
X |
X |
X |
|
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| 1989 |
X |
X |
X |
X |
X |
X |
|
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| 1990 |
X |
X |
X |
X |
X |
X |
|
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| 1991 |
X |
X |
X |
X |
X |
X |
|
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| 1992 |
X |
X |
X |
X |
X |
X |
|
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| 1993 |
X |
X |
X |
X |
X |
X |
|
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| 1994 |
X |
X |
X |
X |
X |
X |
|
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| 1995 |
X |
X |
X |
X |
X |
X |
|
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| 1996 |
X |
X |
X |
X |
X |
X |
|
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| 1997 |
X |
X |
X |
X |
X |
X |
|
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| 1998 |
X |
X |
X |
X |
X |
X |
|
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| 1999 |
X |
X |
X |
X |
X |
X |
|
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| 2000 |
X |
X |
X |
X |
X |
X |
|
X |
| 2001 |
X |
X |
X |
X |
X |
X |
|
X |
| 2002 |
X |
X |
X |
X |
X |
X |
|
X |
| 2003 |
X |
X |
X |
X |
X |
X |
|
X |
| 2004 |
X |
X |
X |
X |
X |
X |
|
X |
| 2005 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2006 |
X |
X |
X |
X |
X |
X |
X |
X |
| 2007 |
X |
X |
X |
X |
X |
X |
X |
X |
More:
Possible Class Structure