| Year | Rank | Number |
| 2008 | 19140 | 5 |
| 2007 | 19185 | 5 |
| 2006 | 14412 | 7 |
| 2005 | 13809 | 7 |
| 2000 | 14175 | 6 |
| 1994 | 7908 | 11 |
| 1993 | 10121 | 8 |
| 1992 | 8448 | 10 |
| 1990 | 9759 | 8 |
| 1989 | 8420 | 9 |
| 1988 | 11137 | 6 |
| 1987 | 12328 | 5 |
| 1986 | 11916 | 5 |
| 1984 | 11342 | 5 |
| 1983 | 7024 | 9 |
| 1982 | 11425 | 5 |
| 1981 | 11291 | 5 |
| 1960 | 6051 | 6 |
| Year | Rank | Number |
| 2008 | 19140 | 5 |
| 2007 | 19185 | 5 |
| 2006 | 14412 | 7 |
| 2005 | 13809 | 7 |
| 2000 | 14175 | 6 |
| 1994 | 7908 | 11 |
| 1993 | 10121 | 8 |
| 1992 | 8448 | 10 |
| 1990 | 9759 | 8 |
| 1989 | 8420 | 9 |
| 1988 | 11137 | 6 |
| 1987 | 12328 | 5 |
| 1986 | 11916 | 5 |
| 1984 | 11342 | 5 |
| 1983 | 7024 | 9 |
| 1982 | 11425 | 5 |
| 1981 | 11291 | 5 |
| 1960 | 6051 | 6 |