| Year | Rank | Number |
| 2011 | 11244 | 6 |
| 2010 | 5811 | 15 |
| 2009 | 5583 | 16 |
| 2008 | 6513 | 13 |
| 2007 | 7254 | 11 |
| 2006 | 6595 | 12 |
| 2005 | 4892 | 17 |
| 2004 | 5914 | 13 |
| 2003 | 5357 | 14 |
| 2002 | 6229 | 11 |
| 2001 | 5474 | 13 |
| 2000 | 6046 | 11 |
| 1999 | 5428 | 12 |
| 1998 | 5598 | 11 |
| 1997 | 7561 | 7 |
| 1996 | 7413 | 7 |
| 1995 | 5255 | 11 |
| 1994 | 6027 | 9 |
| 1993 | 7067 | 7 |
| 1992 | 8897 | 5 |
| 1980 | 6609 | 5 |
| 1976 | 5920 | 5 |
| 1967 | 4190 | 5 |
| 1917 | 4226 | 5 |
| 1916 | 4165 | 5 |
| 1912 | 2389 | 6 |