| 1970 (1) | 1971 (1) | 1972 (1) | 1973 (6) |
| 1974 (16) | 1975 (57) | 1976 (187) | 1977 (584) |
| 1978 (1055) | 1979 (1312) | 1980 (1396) | 1981 (1483) |
| 1982 (1065) | 1983 (1069) | 1984 (1067) | 1985 (888) |
| 1986 (832) | 1987 (1624) | 1988 (772) | 1989 (768) |
| 1990 (740) | 1991 (830) | 1992 (714) | 1993 (905) |
| 1994 (760) | 1995 (718) | 1996 (308) | 1997 (352) |
| 1998 (342) | 1999 (352) | 2000 (659) | 2001 (689) |
| 2002 (729) | 2003 (460) | 2004 (682) | 2005 (615) |
| 2006 (744) | 2007 (604) | 2008 (624) | 2009 (665) |
| 2010 (205) |