| Year | Rank | Number |
| 2011 | 12668 | 5 |
| 2004 | 10290 | 6 |
| 2002 | 8683 | 7 |
| 2000 | 9410 | 6 |
| 1999 | 9002 | 6 |
| 1998 | 8769 | 6 |
| 1997 | 5036 | 12 |
| 1996 | 9374 | 5 |
| 1995 | 7199 | 7 |
| 1993 | 4777 | 12 |
| 1992 | 6874 | 7 |
| 1991 | 4845 | 11 |
| 1990 | 5485 | 9 |
| Year | Rank | Number |
| 2011 | 12668 | 5 |
| 2004 | 10290 | 6 |
| 2002 | 8683 | 7 |
| 2000 | 9410 | 6 |
| 1999 | 9002 | 6 |
| 1998 | 8769 | 6 |
| 1997 | 5036 | 12 |
| 1996 | 9374 | 5 |
| 1995 | 7199 | 7 |
| 1993 | 4777 | 12 |
| 1992 | 6874 | 7 |
| 1991 | 4845 | 11 |
| 1990 | 5485 | 9 |