| Year | Rank | Number |
| 1996 | 13206 | 6 |
| 1995 | 8641 | 10 |
| 1994 | 7012 | 13 |
| 1993 | 3975 | 27 |
| 1992 | 5669 | 17 |
| 1991 | 5147 | 19 |
| 1990 | 4349 | 23 |
| 1989 | 7369 | 11 |
| 1988 | 5549 | 15 |
| 1987 | 4832 | 17 |
| 1986 | 4317 | 19 |
| 1985 | 6369 | 11 |
| 1984 | 4918 | 15 |
| 1983 | 8807 | 7 |
| 1982 | 7354 | 9 |
| 1981 | 11808 | 5 |
| 1979 | 7893 | 8 |
| 1975 | 8832 | 6 |
| Year | Rank | Number |
| 1996 | 13206 | 6 |
| 1995 | 8641 | 10 |
| 1994 | 7012 | 13 |
| 1993 | 3975 | 27 |
| 1992 | 5669 | 17 |
| 1991 | 5147 | 19 |
| 1990 | 4349 | 23 |
| 1989 | 7369 | 11 |
| 1988 | 5549 | 15 |
| 1987 | 4832 | 17 |
| 1986 | 4317 | 19 |
| 1985 | 6369 | 11 |
| 1984 | 4918 | 15 |
| 1983 | 8807 | 7 |
| 1982 | 7354 | 9 |
| 1981 | 11808 | 5 |
| 1979 | 7893 | 8 |
| 1975 | 8832 | 6 |