| Year | Rank | Number |
| 2007 | 16878 | 6 |
| 2005 | 12617 | 8 |
| 2004 | 15416 | 6 |
| 2002 | 9993 | 10 |
| 1999 | 13843 | 6 |
| 1998 | 13561 | 6 |
| 1997 | 9545 | 9 |
| 1996 | 10207 | 8 |
| 1995 | 9274 | 9 |
| 1994 | 10199 | 8 |
| 1993 | 5595 | 17 |
| 1992 | 9239 | 9 |
| 1991 | 9086 | 9 |
| 1990 | 7151 | 12 |
| 1989 | 6806 | 12 |
| 1988 | 6539 | 12 |
| 1987 | 10760 | 6 |
| 1986 | 10399 | 6 |
| 1985 | 6766 | 10 |
| 1984 | 7187 | 9 |
| 1983 | 6069 | 11 |
| 1982 | 7940 | 8 |
| 1981 | 8679 | 7 |
| 1979 | 11277 | 5 |
| 1978 | 8213 | 7 |
| 1972 | 7008 | 7 |
| 1971 | 9144 | 5 |
| 1953 | 6253 | 5 |