| Year | Rank | Number |
| 2011 | 17393 | 5 |
| 2010 | 17667 | 5 |
| 2009 | 15635 | 6 |
| 2008 | 10236 | 11 |
| 2007 | 16006 | 6 |
| 2006 | 12694 | 8 |
| 2005 | 7591 | 15 |
| 2004 | 10102 | 10 |
| 2003 | 16433 | 5 |
| 2002 | 11404 | 8 |
| 2001 | 10332 | 9 |
| 2000 | 12137 | 7 |
| 1998 | 8764 | 10 |
| 1996 | 14116 | 5 |
| 1995 | 10822 | 7 |
| 1994 | 14027 | 5 |
| 1993 | 9816 | 8 |
| Year | Rank | Number |
| 2011 | 17393 | 5 |
| 2010 | 17667 | 5 |
| 2009 | 15635 | 6 |
| 2008 | 10236 | 11 |
| 2007 | 16006 | 6 |
| 2006 | 12694 | 8 |
| 2005 | 7591 | 15 |
| 2004 | 10102 | 10 |
| 2003 | 16433 | 5 |
| 2002 | 11404 | 8 |
| 2001 | 10332 | 9 |
| 2000 | 12137 | 7 |
| 1998 | 8764 | 10 |
| 1996 | 14116 | 5 |
| 1995 | 10822 | 7 |
| 1994 | 14027 | 5 |
| 1993 | 9816 | 8 |