| Year | Count |
|---|---|
| 1952 | 7 |
| 1954 | 11 |
| 1955 | 29 |
| 1956 | 10 |
| 1957 | 20 |
| 1958 | 18 |
| 1959 | 5 |
| 1960 | 19 |
| 1963 | 7 |
| 1964 | 19 |
| 1965 | 5 |
| 1967 | 10 |
| 1968 | 12 |
| 1969 | 6 |
| 1970 | 8 |
| 1971 | 5 |
| 1972 | 13 |
| 1973 | 6 |
| 1974 | 16 |
| 1975 | 8 |
| 1976 | 5 |
| 1978 | 10 |
| 1980 | 10 |
| 1981 | 5 |
| 1982 | 9 |
| 1983 | 12 |
| 1984 | 11 |
| 1985 | 16 |
| 1986 | 26 |
| 1987 | 14 |
| 1988 | 18 |
| 1989 | 8 |
| 1990 | 5 |
| 1991 | 9 |
| 1992 | 5 |
| 1993 | 9 |
| 1996 | 14 |
| 1997 | 21 |
| 1998 | 13 |
| 2001 | 33 |
| 2003 | 5 |
| 2004 | 55 |
| 2005 | 24 |
| 2006 | 8 |
| 2007 | 25 |
| 2008 | 16 |
| 2010 | 12 |
| 2011 | 16 |
| 2012 | 14 |
| 2020 | 8 |
| 2024 | 5 |