| Year | Rank | Number |
| 2011 | 9328 | 12 |
| 2010 | 6247 | 21 |
| 2009 | 6601 | 20 |
| 2008 | 9712 | 12 |
| 2007 | 6662 | 20 |
| 2006 | 6444 | 20 |
| 2005 | 8540 | 13 |
| 2004 | 7213 | 16 |
| 2003 | 11785 | 8 |
| 2002 | 6243 | 18 |
| 2001 | 7932 | 13 |
| 2000 | 11179 | 8 |
| 1999 | 7940 | 12 |
| 1998 | 9633 | 9 |
| Year | Rank | Number |
| 2011 | 9328 | 12 |
| 2010 | 6247 | 21 |
| 2009 | 6601 | 20 |
| 2008 | 9712 | 12 |
| 2007 | 6662 | 20 |
| 2006 | 6444 | 20 |
| 2005 | 8540 | 13 |
| 2004 | 7213 | 16 |
| 2003 | 11785 | 8 |
| 2002 | 6243 | 18 |
| 2001 | 7932 | 13 |
| 2000 | 11179 | 8 |
| 1999 | 7940 | 12 |
| 1998 | 9633 | 9 |