| Year | Count |
|---|---|
| 1925 | 6 |
| 1927 | 12 |
| 1928 | 20 |
| 1929 | 16 |
| 1930 | 5 |
| 1931 | 8 |
| 1932 | 20 |
| 1933 | 17 |
| 1934 | 13 |
| 1935 | 14 |
| 1936 | 14 |
| 1937 | 19 |
| 1938 | 19 |
| 1939 | 15 |
| 1940 | 20 |
| 1941 | 55 |
| 1942 | 70 |
| 1943 | 53 |
| 1944 | 50 |
| 1945 | 47 |
| 1946 | 66 |
| 1947 | 99 |
| 1948 | 79 |
| 1949 | 60 |
| 1950 | 80 |
| 1951 | 59 |
| 1952 | 61 |
| 1953 | 43 |
| 1954 | 23 |
| 1955 | 92 |
| 1956 | 54 |
| 1957 | 67 |
| 1958 | 63 |
| 1959 | 71 |
| 1960 | 103 |
| 1961 | 91 |
| 1962 | 33 |
| 1963 | 42 |
| 1964 | 58 |
| 1965 | 46 |
| 1966 | 64 |
| 1967 | 69 |
| 1968 | 74 |
| 1969 | 85 |
| 1970 | 101 |
| 1971 | 44 |
| 1972 | 76 |
| 1973 | 20 |
| 1974 | 5 |
| 1975 | 21 |
| 1976 | 33 |
| 1977 | 5 |
| 1979 | 16 |
| 1996 | 6 |
| 2017 | 18 |