| Year | Rank | Number |
| 2011 | 7045 | 11 |
| 2010 | 11020 | 6 |
| 2008 | 12897 | 5 |
| 2003 | 9847 | 6 |
| 2001 | 9527 | 6 |
| 2000 | 8384 | 7 |
| 1998 | 6999 | 8 |
| 1996 | 8169 | 6 |
| 1995 | 4855 | 12 |
| 1994 | 5958 | 9 |
| 1993 | 6332 | 8 |
| 1992 | 7637 | 6 |
| 1991 | 7482 | 6 |
| 1990 | 4737 | 11 |
| 1988 | 6588 | 6 |
| 1987 | 4016 | 11 |
| 1986 | 6101 | 6 |
| Year | Rank | Number |
| 2011 | 7045 | 11 |
| 2010 | 11020 | 6 |
| 2008 | 12897 | 5 |
| 2003 | 9847 | 6 |
| 2001 | 9527 | 6 |
| 2000 | 8384 | 7 |
| 1998 | 6999 | 8 |
| 1996 | 8169 | 6 |
| 1995 | 4855 | 12 |
| 1994 | 5958 | 9 |
| 1993 | 6332 | 8 |
| 1992 | 7637 | 6 |
| 1991 | 7482 | 6 |
| 1990 | 4737 | 11 |
| 1988 | 6588 | 6 |
| 1987 | 4016 | 11 |
| 1986 | 6101 | 6 |