| Year | Rank | Number |
| 2001 | 12813 | 7 |
| 1996 | 14762 | 5 |
| 1995 | 12624 | 6 |
| 1994 | 8489 | 10 |
| 1992 | 10000 | 8 |
| 1991 | 7707 | 11 |
| 1990 | 8220 | 10 |
| 1988 | 6884 | 11 |
| 1987 | 6150 | 12 |
| 1986 | 11878 | 5 |
| 1985 | 11580 | 5 |
| 1984 | 9759 | 6 |
| 1983 | 7665 | 8 |
| 1982 | 5370 | 13 |
| 1981 | 8571 | 7 |
| 1980 | 9696 | 6 |
| 1979 | 7019 | 9 |
| 1978 | 5365 | 12 |
| 1977 | 4142 | 17 |
| 1976 | 5390 | 11 |
| 1975 | 5000 | 12 |
| 1974 | 6546 | 8 |
| 1973 | 6367 | 8 |
| 1972 | 8948 | 5 |
| 1970 | 8656 | 5 |