| Year | Rank | Number |
| 2011 | 8589 | 9 |
| 2010 | 6617 | 13 |
| 2009 | 10680 | 7 |
| 2008 | 8163 | 10 |
| 2006 | 10441 | 7 |
| 2004 | 12858 | 5 |
| 2001 | 9036 | 7 |
| 1997 | 10529 | 5 |
| 1994 | 6855 | 8 |
| 1988 | 8268 | 5 |
| Year | Rank | Number |
| 2011 | 8589 | 9 |
| 2010 | 6617 | 13 |
| 2009 | 10680 | 7 |
| 2008 | 8163 | 10 |
| 2006 | 10441 | 7 |
| 2004 | 12858 | 5 |
| 2001 | 9036 | 7 |
| 1997 | 10529 | 5 |
| 1994 | 6855 | 8 |
| 1988 | 8268 | 5 |