| Year | Rank | Number |
| 2010 | 16043 | 6 |
| 2006 | 16233 | 6 |
| 2003 | 14924 | 6 |
| 2002 | 16976 | 5 |
| 1994 | 14709 | 5 |
| 1990 | 14229 | 5 |
| 1986 | 11923 | 5 |
| 1984 | 7804 | 8 |
| 1980 | 11311 | 5 |
| 1977 | 10492 | 5 |
| 1972 | 8985 | 5 |
| 1971 | 6995 | 7 |
| 1970 | 5245 | 10 |
| 1968 | 5403 | 8 |
| 1967 | 3957 | 12 |
| 1966 | 7127 | 5 |
| 1965 | 7064 | 5 |
| 1963 | 4147 | 11 |
| 1960 | 6054 | 6 |