| Year | Rank | Number |
| 2011 | 11068 | 6 |
| 2009 | 12792 | 5 |
| 2008 | 12900 | 5 |
| 2006 | 12419 | 5 |
| 2005 | 11824 | 5 |
| 2000 | 10735 | 5 |
| 1998 | 9941 | 5 |
| 1997 | 9588 | 5 |
| 1996 | 9318 | 5 |
| 1995 | 5195 | 11 |
| 1994 | 9101 | 5 |
| 1992 | 8680 | 5 |
| 1988 | 5295 | 8 |
| 1987 | 6272 | 6 |
| 1981 | 4597 | 8 |
| Year | Rank | Number |
| 2011 | 11068 | 6 |
| 2009 | 12792 | 5 |
| 2008 | 12900 | 5 |
| 2006 | 12419 | 5 |
| 2005 | 11824 | 5 |
| 2000 | 10735 | 5 |
| 1998 | 9941 | 5 |
| 1997 | 9588 | 5 |
| 1996 | 9318 | 5 |
| 1995 | 5195 | 11 |
| 1994 | 9101 | 5 |
| 1992 | 8680 | 5 |
| 1988 | 5295 | 8 |
| 1987 | 6272 | 6 |
| 1981 | 4597 | 8 |