| Year | Rank | Number |
| 2011 | 17392 | 5 |
| 2010 | 15426 | 6 |
| 2009 | 12652 | 8 |
| 2008 | 10983 | 10 |
| 2007 | 9673 | 12 |
| 2006 | 6632 | 19 |
| 2005 | 9609 | 11 |
| 2004 | 11902 | 8 |
| 2003 | 8653 | 12 |
| 2002 | 16130 | 5 |
| 2001 | 10331 | 9 |
| 2000 | 15715 | 5 |
| 1999 | 13120 | 6 |
| 1998 | 11458 | 7 |
| 1997 | 9230 | 9 |
| 1996 | 10871 | 7 |
| 1995 | 8962 | 9 |
| 1993 | 10893 | 7 |
| Year | Rank | Number |
| 2011 | 17392 | 5 |
| 2010 | 15426 | 6 |
| 2009 | 12652 | 8 |
| 2008 | 10983 | 10 |
| 2007 | 9673 | 12 |
| 2006 | 6632 | 19 |
| 2005 | 9609 | 11 |
| 2004 | 11902 | 8 |
| 2003 | 8653 | 12 |
| 2002 | 16130 | 5 |
| 2001 | 10331 | 9 |
| 2000 | 15715 | 5 |
| 1999 | 13120 | 6 |
| 1998 | 11458 | 7 |
| 1997 | 9230 | 9 |
| 1996 | 10871 | 7 |
| 1995 | 8962 | 9 |
| 1993 | 10893 | 7 |