| Year | Rank | Number |
| 2011 | 15816 | 6 |
| 2009 | 13034 | 8 |
| 2003 | 17199 | 5 |
| 1987 | 12326 | 5 |
| 1985 | 11618 | 5 |
| 1982 | 9856 | 6 |
| 1981 | 11290 | 5 |
| 1979 | 11087 | 5 |
| 1978 | 9157 | 6 |
| Year | Rank | Number |
| 2011 | 15816 | 6 |
| 2009 | 13034 | 8 |
| 2003 | 17199 | 5 |
| 1987 | 12326 | 5 |
| 1985 | 11618 | 5 |
| 1982 | 9856 | 6 |
| 1981 | 11290 | 5 |
| 1979 | 11087 | 5 |
| 1978 | 9157 | 6 |