| Year | Rank | Number |
| 2009 | 17423 | 5 |
| 2007 | 14035 | 7 |
| 2004 | 10770 | 9 |
| 2000 | 9221 | 10 |
| 1998 | 14321 | 5 |
| 1997 | 10940 | 7 |
| 1996 | 11941 | 6 |
| 1995 | 11893 | 6 |
| 1993 | 11877 | 6 |
| 1989 | 8088 | 9 |
| 1985 | 8373 | 7 |
| 1983 | 7340 | 8 |
| 1982 | 10584 | 5 |
| 1981 | 10500 | 5 |
| 1980 | 8203 | 7 |
| 1977 | 9719 | 5 |
| Year | Rank | Number |
| 2009 | 17423 | 5 |
| 2007 | 14035 | 7 |
| 2004 | 10770 | 9 |
| 2000 | 9221 | 10 |
| 1998 | 14321 | 5 |
| 1997 | 10940 | 7 |
| 1996 | 11941 | 6 |
| 1995 | 11893 | 6 |
| 1993 | 11877 | 6 |
| 1989 | 8088 | 9 |
| 1985 | 8373 | 7 |
| 1983 | 7340 | 8 |
| 1982 | 10584 | 5 |
| 1981 | 10500 | 5 |
| 1980 | 8203 | 7 |
| 1977 | 9719 | 5 |