| Year | Rank | Number |
| 2011 | 7629 | 10 |
| 2010 | 6796 | 12 |
| 2009 | 6869 | 12 |
| 2008 | 6507 | 13 |
| 2007 | 7244 | 11 |
| 2006 | 6585 | 12 |
| 2005 | 6776 | 11 |
| 2004 | 11935 | 5 |
| 2003 | 4486 | 18 |
| 2002 | 6695 | 10 |
| 2001 | 11121 | 5 |
| 2000 | 8483 | 7 |
| 1999 | 4851 | 14 |
| 1998 | 5246 | 12 |
| 1997 | 6254 | 9 |
| 1994 | 5592 | 10 |
| 1992 | 8868 | 5 |
| 1977 | 5357 | 6 |
| Year | Rank | Number |
| 2011 | 7629 | 10 |
| 2010 | 6796 | 12 |
| 2009 | 6869 | 12 |
| 2008 | 6507 | 13 |
| 2007 | 7244 | 11 |
| 2006 | 6585 | 12 |
| 2005 | 6776 | 11 |
| 2004 | 11935 | 5 |
| 2003 | 4486 | 18 |
| 2002 | 6695 | 10 |
| 2001 | 11121 | 5 |
| 2000 | 8483 | 7 |
| 1999 | 4851 | 14 |
| 1998 | 5246 | 12 |
| 1997 | 6254 | 9 |
| 1994 | 5592 | 10 |
| 1992 | 8868 | 5 |
| 1977 | 5357 | 6 |