| Year | Rank | Number |
| 2011 | 3537 | 44 |
| 2010 | 4205 | 35 |
| 2009 | 4467 | 33 |
| 2008 | 5797 | 24 |
| 2007 | 5117 | 28 |
| 2006 | 8367 | 14 |
| 2005 | 6903 | 17 |
| 2004 | 5097 | 25 |
| 2003 | 5868 | 20 |
| 2002 | 5120 | 23 |
| 2001 | 4726 | 25 |
| 2000 | 6279 | 17 |
| 1999 | 4480 | 25 |
| 1998 | 7225 | 13 |
| 1997 | 11185 | 7 |
| 1996 | 14167 | 5 |
| 1993 | 10918 | 7 |
| Year | Rank | Number |
| 2011 | 3537 | 44 |
| 2010 | 4205 | 35 |
| 2009 | 4467 | 33 |
| 2008 | 5797 | 24 |
| 2007 | 5117 | 28 |
| 2006 | 8367 | 14 |
| 2005 | 6903 | 17 |
| 2004 | 5097 | 25 |
| 2003 | 5868 | 20 |
| 2002 | 5120 | 23 |
| 2001 | 4726 | 25 |
| 2000 | 6279 | 17 |
| 1999 | 4480 | 25 |
| 1998 | 7225 | 13 |
| 1997 | 11185 | 7 |
| 1996 | 14167 | 5 |
| 1993 | 10918 | 7 |