| Year | Rank | Number |
| 2008 | 15055 | 7 |
| 2005 | 12785 | 8 |
| 2004 | 18263 | 5 |
| 2002 | 11962 | 8 |
| 1999 | 16392 | 5 |
| 1997 | 15638 | 5 |
| 1995 | 15274 | 5 |
| 1994 | 13078 | 6 |
| 1992 | 13004 | 6 |
| 1991 | 9189 | 9 |
| 1990 | 12583 | 6 |
| Year | Rank | Number |
| 2008 | 15055 | 7 |
| 2005 | 12785 | 8 |
| 2004 | 18263 | 5 |
| 2002 | 11962 | 8 |
| 1999 | 16392 | 5 |
| 1997 | 15638 | 5 |
| 1995 | 15274 | 5 |
| 1994 | 13078 | 6 |
| 1992 | 13004 | 6 |
| 1991 | 9189 | 9 |
| 1990 | 12583 | 6 |