| Year | Rank | Number |
| 2011 | 12364 | 5 |
| 2010 | 10856 | 6 |
| 2008 | 9057 | 8 |
| 2007 | 8220 | 9 |
| 2005 | 11620 | 5 |
| 2004 | 9013 | 7 |
| 2000 | 7494 | 8 |
| 1999 | 6581 | 9 |
| 1996 | 6547 | 8 |
| 1993 | 8805 | 5 |
| 1990 | 7242 | 6 |
| 1988 | 5232 | 8 |
| 1986 | 6799 | 5 |
| 1985 | 5831 | 6 |
| 1984 | 6395 | 5 |
| 1982 | 5678 | 6 |
| 1980 | 5571 | 6 |
| 1979 | 3823 | 10 |
| 1919 | 4200 | 5 |
| 1918 | 3390 | 7 |