| Year | Rank | Number |
| 2009 | 9828 | 7 |
| 2008 | 6399 | 13 |
| 2007 | 8188 | 9 |
| 2006 | 12112 | 5 |
| 2005 | 9159 | 7 |
| 2004 | 11431 | 5 |
| 2003 | 9620 | 6 |
| 2002 | 10747 | 5 |
| 2001 | 9293 | 6 |
| 2000 | 6859 | 9 |
| 1999 | 7906 | 7 |
| 1997 | 6630 | 8 |
| 1996 | 5992 | 9 |
| 1995 | 5514 | 10 |
| 1994 | 5464 | 10 |
| 1993 | 7673 | 6 |
| 1992 | 7455 | 6 |
| 1991 | 6542 | 7 |
| 1990 | 4675 | 11 |
| 1987 | 5470 | 7 |
| 1983 | 5498 | 6 |
| 1976 | 5617 | 5 |
| 1973 | 4526 | 6 |
| 1965 | 2988 | 8 |
| 1955 | 3506 | 6 |
| 1925 | 4210 | 5 |
| 1922 | 4338 | 5 |
| 1917 | 3559 | 6 |
| 1915 | 3411 | 6 |