| Year | Rank | Number |
| 2011 | 5125 | 27 |
| 2010 | 7410 | 17 |
| 2009 | 9185 | 13 |
| 2008 | 6727 | 20 |
| 2007 | 9385 | 13 |
| 2006 | 9737 | 12 |
| 2005 | 7798 | 15 |
| 2004 | 12447 | 8 |
| 2003 | 15266 | 6 |
| 2002 | 9317 | 11 |
| 2001 | 6884 | 16 |
| 2000 | 12798 | 7 |
| 1999 | 13971 | 6 |
| 1998 | 13690 | 6 |
| 1996 | 15224 | 5 |
| 1995 | 11432 | 7 |
| 1994 | 11432 | 7 |
| 1964 | 6555 | 6 |
| 1917 | 4015 | 7 |