1974 | February | June | December | |
1975 | June | December | ||
1976 | June | December | ||
1977 | June | December | ||
1978 | June | December | ||
1979 | June | December | ||
1980 | June | December | ||
1981 | June | December | ||
1982 | June | December | ||
1983 | June | December | ||
1984 | June | December | ||
1985 | June | December | ||
1986 | June | December | ||
1987 | June | December | ||
1988 | June | December | ||
1989 | June | December | ||
1990 | June | December | ||
1991 | June | December | ||
1992 | Winter | Summer | ||
1993 | Spring | Summer | Fall | Winter |
1994 | Spring | Summer | Fall | Winter |
1995 | Spring | Summer | Fall | Winter |
1996 | Spring | Summer | Fall | Winter |
1997 | Spring | Summer | Fall | Winter |
1998 | Spring | Summer - Fall | Winter | |
1999 | Summer | Winter | ||
2000 | Summer | Winter | ||
2001 | Summer | Winter | ||
2002 | Summer | Winter | ||
2003 | Summer | Winter | ||
2004 | Summer | Winter |