| Year | Rank | Number |
| 2008 | 14482 | 7 |
| 2007 | 18865 | 5 |
| 2006 | 12898 | 8 |
| 2005 | 11307 | 9 |
| 2004 | 13376 | 7 |
| 2002 | 10609 | 9 |
| 2001 | 9019 | 11 |
| 2000 | 13955 | 6 |
| 1999 | 15500 | 5 |
| 1997 | 10232 | 8 |
| 1996 | 12541 | 6 |
| 1994 | 12493 | 6 |
| 1987 | 10428 | 6 |
| 1981 | 9598 | 6 |
| 1971 | 7772 | 6 |
| 1969 | 7954 | 5 |
| Year | Rank | Number |
| 2008 | 14482 | 7 |
| 2007 | 18865 | 5 |
| 2006 | 12898 | 8 |
| 2005 | 11307 | 9 |
| 2004 | 13376 | 7 |
| 2002 | 10609 | 9 |
| 2001 | 9019 | 11 |
| 2000 | 13955 | 6 |
| 1999 | 15500 | 5 |
| 1997 | 10232 | 8 |
| 1996 | 12541 | 6 |
| 1994 | 12493 | 6 |
| 1987 | 10428 | 6 |
| 1981 | 9598 | 6 |
| 1971 | 7772 | 6 |
| 1969 | 7954 | 5 |