| Year | Count |
|---|---|
| 1923 | 5 |
| 1949 | 8 |
| 1952 | 5 |
| 1955 | 12 |
| 1956 | 48 |
| 1957 | 14 |
| 1958 | 18 |
| 1959 | 23 |
| 1960 | 23 |
| 1962 | 18 |
| 1963 | 10 |
| 1964 | 5 |
| 1965 | 5 |
| 1967 | 7 |
| 1968 | 25 |
| 1969 | 12 |
| 1970 | 12 |
| 1971 | 23 |
| 1972 | 23 |
| 1973 | 13 |
| 1974 | 12 |
| 1975 | 7 |
| 1976 | 40 |
| 1978 | 5 |
| 1979 | 25 |
| 1980 | 39 |
| 1981 | 39 |
| 1982 | 100 |
| 1983 | 54 |
| 1984 | 59 |
| 1985 | 61 |
| 1986 | 19 |
| 1987 | 25 |
| 1988 | 19 |
| 1989 | 5 |
| 1992 | 6 |
| 2005 | 14 |
| 2006 | 5 |
| 2011 | 12 |