| Year | Rank | Number |
| 2011 | 3418 | 47 |
| 2010 | 4355 | 34 |
| 2009 | 4390 | 34 |
| 2008 | 3134 | 54 |
| 2007 | 4525 | 33 |
| 2006 | 3709 | 42 |
| 2005 | 4001 | 36 |
| 2004 | 4888 | 27 |
| 2003 | 3569 | 40 |
| 2002 | 5378 | 22 |
| 2001 | 6519 | 17 |
| 2000 | 11418 | 8 |
| 1999 | 8040 | 12 |
| 1998 | 8368 | 11 |
| 1997 | 13146 | 6 |
| Year | Rank | Number |
| 2011 | 3418 | 47 |
| 2010 | 4355 | 34 |
| 2009 | 4390 | 34 |
| 2008 | 3134 | 54 |
| 2007 | 4525 | 33 |
| 2006 | 3709 | 42 |
| 2005 | 4001 | 36 |
| 2004 | 4888 | 27 |
| 2003 | 3569 | 40 |
| 2002 | 5378 | 22 |
| 2001 | 6519 | 17 |
| 2000 | 11418 | 8 |
| 1999 | 8040 | 12 |
| 1998 | 8368 | 11 |
| 1997 | 13146 | 6 |