| Year | Count |
|---|---|
| 1914 | 5 |
| 1919 | 5 |
| 1920 | 5 |
| 1929 | 5 |
| 1935 | 15 |
| 1939 | 17 |
| 1940 | 5 |
| 1941 | 5 |
| 1942 | 12 |
| 1946 | 5 |
| 1947 | 10 |
| 1950 | 7 |
| 1953 | 8 |
| 1954 | 5 |
| 1959 | 11 |
| 1960 | 7 |
| 1961 | 6 |
| 1963 | 15 |
| 1965 | 5 |
| 1966 | 5 |
| 1967 | 18 |
| 1969 | 11 |
| 1970 | 15 |
| 1971 | 16 |
| 1972 | 24 |
| 1973 | 10 |
| 1974 | 13 |
| 1975 | 20 |
| 1976 | 23 |
| 1977 | 21 |
| 1978 | 23 |
| 1979 | 5 |
| 1980 | 6 |
| 1981 | 29 |
| 1982 | 26 |
| 1983 | 18 |
| 1984 | 10 |
| 1986 | 17 |
| 1990 | 5 |
| 1995 | 5 |