| Year | Rank | Number |
| 2009 | 18432 | 5 |
| 2008 | 18730 | 5 |
| 2006 | 10180 | 11 |
| 2005 | 12329 | 8 |
| 2004 | 10248 | 10 |
| 2003 | 8741 | 12 |
| 2002 | 12789 | 7 |
| 2001 | 12637 | 7 |
| 2000 | 12366 | 7 |
| 1999 | 9093 | 10 |
| 1998 | 13147 | 6 |
| 1995 | 9961 | 8 |
| 1994 | 11045 | 7 |
| 1993 | 14437 | 5 |
| 1991 | 14098 | 5 |
| Year | Rank | Number |
| 2009 | 18432 | 5 |
| 2008 | 18730 | 5 |
| 2006 | 10180 | 11 |
| 2005 | 12329 | 8 |
| 2004 | 10248 | 10 |
| 2003 | 8741 | 12 |
| 2002 | 12789 | 7 |
| 2001 | 12637 | 7 |
| 2000 | 12366 | 7 |
| 1999 | 9093 | 10 |
| 1998 | 13147 | 6 |
| 1995 | 9961 | 8 |
| 1994 | 11045 | 7 |
| 1993 | 14437 | 5 |
| 1991 | 14098 | 5 |