| Year | Count |
|---|---|
| 1943 | 5 |
| 1944 | 7 |
| 1946 | 7 |
| 1947 | 15 |
| 1948 | 14 |
| 1949 | 12 |
| 1950 | 12 |
| 1951 | 18 |
| 1952 | 25 |
| 1952 | 6 |
| 1953 | 13 |
| 1954 | 13 |
| 1955 | 9 |
| 1956 | 17 |
| 1957 | 22 |
| 1957 | 7 |
| 1958 | 12 |
| 1959 | 24 |
| 1960 | 14 |
| 1961 | 5 |
| 1963 | 8 |
| 1964 | 6 |
| 1970 | 5 |
| 1975 | 5 |
| 1978 | 10 |
| 1989 | 6 |
| 1990 | 7 |
| 1993 | 8 |
| 1994 | 12 |
| 1995 | 14 |
| 1996 | 7 |
| 1997 | 7 |
| 1998 | 7 |
| 1999 | 5 |
| 2002 | 5 |
| 2003 | 5 |