| Year | Count |
|---|---|
| 1926 | 12 |
| 1928 | 10 |
| 1929 | 12 |
| 1932 | 6 |
| 1936 | 5 |
| 1937 | 7 |
| 1937 | 6 |
| 1938 | 5 |
| 1939 | 6 |
| 1941 | 15 |
| 1942 | 26 |
| 1943 | 41 |
| 1944 | 67 |
| 1945 | 72 |
| 1946 | 154 |
| 1947 | 164 |
| 1947 | 5 |
| 1948 | 165 |
| 1948 | 6 |
| 1949 | 144 |
| 1949 | 5 |
| 1950 | 146 |
| 1950 | 5 |
| 1951 | 179 |
| 1952 | 229 |
| 1952 | 5 |
| 1953 | 250 |
| 1954 | 253 |
| 1954 | 15 |
| 1955 | 212 |
| 1955 | 5 |
| 1956 | 255 |
| 1957 | 248 |
| 1957 | 5 |
| 1958 | 176 |
| 1959 | 157 |
| 1960 | 177 |
| 1961 | 187 |
| 1962 | 224 |
| 1963 | 146 |
| 1964 | 130 |
| 1965 | 113 |
| 1966 | 47 |
| 1967 | 89 |
| 1968 | 56 |
| 1969 | 67 |
| 1969 | 5 |
| 1970 | 54 |
| 1971 | 54 |
| 1972 | 28 |
| 1973 | 25 |
| 1974 | 13 |
| 1975 | 28 |
| 1976 | 18 |
| 1977 | 5 |
| 1983 | 6 |