| Year | Rank | Number |
| 2011 | 5588 | 24 |
| 2010 | 5846 | 23 |
| 2009 | 6137 | 22 |
| 2008 | 4288 | 36 |
| 2007 | 3296 | 51 |
| 2006 | 2232 | 86 |
| 2005 | 953 | 258 |
| 1984 | 7683 | 8 |
| 1974 | 8106 | 6 |
| 1972 | 6196 | 8 |
| 1969 | 6986 | 6 |
| 1968 | 7484 | 5 |
| 1967 | 5687 | 7 |
| 1966 | 5478 | 7 |
| 1965 | 6938 | 5 |
| 1962 | 6169 | 6 |
| 1957 | 4060 | 10 |
| 1954 | 6133 | 5 |
| Year | Rank | Number |
| 2011 | 5588 | 24 |
| 2010 | 5846 | 23 |
| 2009 | 6137 | 22 |
| 2008 | 4288 | 36 |
| 2007 | 3296 | 51 |
| 2006 | 2232 | 86 |
| 2005 | 953 | 258 |
| 1984 | 7683 | 8 |
| 1974 | 8106 | 6 |
| 1972 | 6196 | 8 |
| 1969 | 6986 | 6 |
| 1968 | 7484 | 5 |
| 1967 | 5687 | 7 |
| 1966 | 5478 | 7 |
| 1965 | 6938 | 5 |
| 1962 | 6169 | 6 |
| 1957 | 4060 | 10 |
| 1954 | 6133 | 5 |