| Year | Rank | Number |
| 2006 | 18456 | 5 |
| 2003 | 14707 | 6 |
| 2001 | 16536 | 5 |
| 2000 | 16181 | 5 |
| 1999 | 10801 | 8 |
| 1998 | 8248 | 11 |
| 1996 | 9982 | 8 |
| 1995 | 7760 | 11 |
| 1994 | 9158 | 9 |
| 1993 | 11099 | 7 |
| 1992 | 7243 | 12 |
| 1991 | 8245 | 10 |
| 1990 | 6628 | 13 |
| 1989 | 5402 | 16 |
| 1988 | 8743 | 8 |
| 1987 | 5736 | 13 |
| 1985 | 9844 | 6 |
| Year | Rank | Number |
| 2006 | 18456 | 5 |
| 2003 | 14707 | 6 |
| 2001 | 16536 | 5 |
| 2000 | 16181 | 5 |
| 1999 | 10801 | 8 |
| 1998 | 8248 | 11 |
| 1996 | 9982 | 8 |
| 1995 | 7760 | 11 |
| 1994 | 9158 | 9 |
| 1993 | 11099 | 7 |
| 1992 | 7243 | 12 |
| 1991 | 8245 | 10 |
| 1990 | 6628 | 13 |
| 1989 | 5402 | 16 |
| 1988 | 8743 | 8 |
| 1987 | 5736 | 13 |
| 1985 | 9844 | 6 |