| Year | Count |
|---|---|
| 1954 | 15 |
| 1958 | 10 |
| 1973 | 8 |
| 1974 | 9 |
| 1975 | 10 |
| 1976 | 11 |
| 1977 | 6 |
| 1978 | 32 |
| 1979 | 16 |
| 1980 | 13 |
| 1981 | 15 |
| 1982 | 33 |
| 1983 | 20 |
| 1984 | 6 |
| 1985 | 5 |
| 1986 | 5 |
| 1987 | 5 |
| 1988 | 11 |
| 1989 | 6 |
| 1991 | 15 |
| 1994 | 10 |
| 1995 | 14 |
| 1996 | 5 |
| 2000 | 15 |
| 2001 | 22 |
| 2002 | 15 |
| 2003 | 19 |
| 2004 | 33 |
| 2005 | 21 |
| 2006 | 5 |
| 2008 | 5 |
| 2013 | 10 |
| 2019 | 10 |
| 2022 | 14 |