| Year | Rank | Number |
| 2010 | 11425 | 6 |
| 2009 | 13359 | 5 |
| 2008 | 11763 | 6 |
| 2000 | 9692 | 6 |
| 1989 | 5914 | 8 |
| 1987 | 7550 | 5 |
| 1984 | 5961 | 6 |
| 1978 | 4352 | 8 |
| 1977 | 4852 | 7 |
| 1976 | 3856 | 9 |
| 1975 | 5121 | 6 |
| 1974 | 4394 | 7 |
| 1973 | 4795 | 6 |
| 1972 | 4206 | 7 |
| Year | Rank | Number |
| 2010 | 11425 | 6 |
| 2009 | 13359 | 5 |
| 2008 | 11763 | 6 |
| 2000 | 9692 | 6 |
| 1989 | 5914 | 8 |
| 1987 | 7550 | 5 |
| 1984 | 5961 | 6 |
| 1978 | 4352 | 8 |
| 1977 | 4852 | 7 |
| 1976 | 3856 | 9 |
| 1975 | 5121 | 6 |
| 1974 | 4394 | 7 |
| 1973 | 4795 | 6 |
| 1972 | 4206 | 7 |