| Year | Rank | Number |
| 2011 | 13389 | 7 |
| 2010 | 6381 | 20 |
| 2009 | 6274 | 21 |
| 2008 | 7084 | 18 |
| 2007 | 6825 | 19 |
| 2006 | 9938 | 11 |
| 2005 | 7529 | 15 |
| 2004 | 7102 | 16 |
| 2002 | 9543 | 10 |
| 2001 | 13652 | 6 |
| 2000 | 15219 | 5 |
| 1998 | 10201 | 8 |
| 1997 | 12202 | 6 |
| 1994 | 13586 | 5 |
| 1991 | 13290 | 5 |
| Year | Rank | Number |
| 2011 | 13389 | 7 |
| 2010 | 6381 | 20 |
| 2009 | 6274 | 21 |
| 2008 | 7084 | 18 |
| 2007 | 6825 | 19 |
| 2006 | 9938 | 11 |
| 2005 | 7529 | 15 |
| 2004 | 7102 | 16 |
| 2002 | 9543 | 10 |
| 2001 | 13652 | 6 |
| 2000 | 15219 | 5 |
| 1998 | 10201 | 8 |
| 1997 | 12202 | 6 |
| 1994 | 13586 | 5 |
| 1991 | 13290 | 5 |