| Year | Rank | Number |
| 2011 | 6348 | 20 |
| 2010 | 6683 | 19 |
| 2009 | 6805 | 19 |
| 2008 | 10192 | 11 |
| 2007 | 5917 | 23 |
| 2006 | 6616 | 19 |
| 2005 | 12036 | 8 |
| 2004 | 9373 | 11 |
| 2003 | 10596 | 9 |
| 2002 | 9624 | 10 |
| 2001 | 8877 | 11 |
| 2000 | 15485 | 5 |
| 1999 | 12981 | 6 |
| 1998 | 9412 | 9 |
| 1997 | 11066 | 7 |
| Year | Rank | Number |
| 2011 | 6348 | 20 |
| 2010 | 6683 | 19 |
| 2009 | 6805 | 19 |
| 2008 | 10192 | 11 |
| 2007 | 5917 | 23 |
| 2006 | 6616 | 19 |
| 2005 | 12036 | 8 |
| 2004 | 9373 | 11 |
| 2003 | 10596 | 9 |
| 2002 | 9624 | 10 |
| 2001 | 8877 | 11 |
| 2000 | 15485 | 5 |
| 1999 | 12981 | 6 |
| 1998 | 9412 | 9 |
| 1997 | 11066 | 7 |