| Year | Rank | Number |
| 2011 | 949 | 208 |
| 2010 | 1009 | 193 |
| 2009 | 1102 | 166 |
| 2008 | 1281 | 135 |
| 2007 | 1664 | 92 |
| 2006 | 2638 | 45 |
| 2005 | 2479 | 46 |
| 2004 | 2621 | 41 |
| 2003 | 3589 | 25 |
| 2002 | 2793 | 34 |
| 2001 | 2837 | 33 |
| 2000 | 2962 | 30 |
| 1999 | 3068 | 27 |
| 1998 | 3562 | 21 |
| 1997 | 4598 | 14 |
| 1996 | 4318 | 15 |
| 1995 | 6237 | 9 |
| 1994 | 4705 | 13 |
| 1993 | 5636 | 10 |
| 1992 | 4758 | 12 |
| 1991 | 7901 | 6 |
| 1990 | 6207 | 8 |
| 1989 | 6679 | 7 |
| 1987 | 6649 | 6 |
| 1985 | 7204 | 5 |
| 1953 | 4164 | 5 |
| 1927 | 4590 | 5 |