| Year | Rank | Number |
| 2011 | 8427 | 9 |
| 2010 | 6558 | 13 |
| 2008 | 6985 | 12 |
| 2007 | 8598 | 9 |
| 2006 | 9202 | 8 |
| 2005 | 10882 | 6 |
| 2003 | 10309 | 6 |
| 2002 | 7377 | 9 |
| 2001 | 9998 | 6 |
| 2000 | 11414 | 5 |
| 1999 | 5877 | 11 |
| 1997 | 10144 | 5 |
| 1996 | 9875 | 5 |
| 1995 | 8407 | 6 |
| 1992 | 9212 | 5 |
| 1991 | 7820 | 6 |
| Year | Rank | Number |
| 2011 | 8427 | 9 |
| 2010 | 6558 | 13 |
| 2008 | 6985 | 12 |
| 2007 | 8598 | 9 |
| 2006 | 9202 | 8 |
| 2005 | 10882 | 6 |
| 2003 | 10309 | 6 |
| 2002 | 7377 | 9 |
| 2001 | 9998 | 6 |
| 2000 | 11414 | 5 |
| 1999 | 5877 | 11 |
| 1997 | 10144 | 5 |
| 1996 | 9875 | 5 |
| 1995 | 8407 | 6 |
| 1992 | 9212 | 5 |
| 1991 | 7820 | 6 |