| Year | Count |
|---|---|
| 1919 | 16 |
| 1921 | 22 |
| 1922 | 5 |
| 1923 | 20 |
| 1924 | 5 |
| 1925 | 9 |
| 1926 | 18 |
| 1928 | 42 |
| 1929 | 18 |
| 1930 | 29 |
| 1931 | 54 |
| 1932 | 90 |
| 1933 | 51 |
| 1934 | 75 |
| 1935 | 19 |
| 1936 | 49 |
| 1937 | 72 |
| 1938 | 99 |
| 1939 | 93 |
| 1940 | 55 |
| 1941 | 55 |
| 1942 | 34 |
| 1943 | 81 |
| 1944 | 57 |
| 1945 | 54 |
| 1946 | 101 |
| 1947 | 96 |
| 1948 | 103 |
| 1949 | 117 |
| 1950 | 106 |
| 1951 | 106 |
| 1952 | 167 |
| 1953 | 134 |
| 1954 | 143 |
| 1955 | 198 |
| 1956 | 251 |
| 1957 | 249 |
| 1958 | 274 |
| 1959 | 224 |
| 1960 | 196 |
| 1961 | 198 |
| 1962 | 136 |
| 1963 | 153 |
| 1964 | 159 |
| 1965 | 145 |
| 1966 | 115 |
| 1967 | 78 |
| 1968 | 72 |
| 1969 | 80 |
| 1970 | 87 |
| 1971 | 52 |
| 1972 | 36 |
| 1973 | 31 |
| 1974 | 6 |
| 1976 | 9 |
| 1978 | 12 |
| 1979 | 19 |