| Year | Rank | Number |
| 2011 | 4391 | 22 |
| 2010 | 5336 | 17 |
| 2009 | 3845 | 27 |
| 2008 | 6211 | 14 |
| 2007 | 6052 | 14 |
| 2006 | 5638 | 15 |
| 2005 | 7930 | 9 |
| 2004 | 5611 | 14 |
| 2003 | 4905 | 16 |
| 2002 | 6754 | 10 |
| 2001 | 7865 | 8 |
| 2000 | 7777 | 8 |
| 1999 | 7464 | 8 |
| 1998 | 10351 | 5 |
| Year | Rank | Number |
| 2011 | 4391 | 22 |
| 2010 | 5336 | 17 |
| 2009 | 3845 | 27 |
| 2008 | 6211 | 14 |
| 2007 | 6052 | 14 |
| 2006 | 5638 | 15 |
| 2005 | 7930 | 9 |
| 2004 | 5611 | 14 |
| 2003 | 4905 | 16 |
| 2002 | 6754 | 10 |
| 2001 | 7865 | 8 |
| 2000 | 7777 | 8 |
| 1999 | 7464 | 8 |
| 1998 | 10351 | 5 |