| Year | Rank | Number |
| 2011 | 12103 | 8 |
| 2010 | 14946 | 6 |
| 2009 | 15158 | 6 |
| 2008 | 17508 | 5 |
| 2007 | 15513 | 6 |
| 2006 | 17202 | 5 |
| 2005 | 13019 | 7 |
| 2004 | 14196 | 6 |
| 2002 | 15473 | 5 |
| 2001 | 15390 | 5 |
| Year | Rank | Number |
| 2011 | 12103 | 8 |
| 2010 | 14946 | 6 |
| 2009 | 15158 | 6 |
| 2008 | 17508 | 5 |
| 2007 | 15513 | 6 |
| 2006 | 17202 | 5 |
| 2005 | 13019 | 7 |
| 2004 | 14196 | 6 |
| 2002 | 15473 | 5 |
| 2001 | 15390 | 5 |