| Year | Count |
|---|---|
| 1910 | 39 |
| 1912 | 9 |
| 1913 | 5 |
| 1915 | 7 |
| 1916 | 7 |
| 1917 | 22 |
| 1918 | 10 |
| 1919 | 13 |
| 1920 | 23 |
| 1921 | 8 |
| 1922 | 9 |
| 1924 | 8 |
| 1925 | 28 |
| 1926 | 28 |
| 1928 | 28 |
| 1929 | 24 |
| 1932 | 20 |
| 1933 | 36 |
| 1939 | 16 |
| 1942 | 10 |
| 1943 | 21 |
| 1944 | 33 |
| 1945 | 8 |
| 1946 | 44 |
| 1947 | 42 |
| 1948 | 61 |
| 1949 | 36 |
| 1950 | 65 |
| 1951 | 66 |
| 1952 | 28 |
| 1953 | 46 |
| 1954 | 79 |
| 1955 | 61 |
| 1956 | 62 |
| 1957 | 139 |
| 1958 | 125 |
| 1959 | 173 |
| 1960 | 157 |
| 1961 | 184 |
| 1962 | 193 |
| 1963 | 229 |
| 1964 | 200 |
| 1965 | 201 |
| 1966 | 99 |
| 1967 | 121 |
| 1968 | 48 |
| 1969 | 103 |
| 1970 | 56 |
| 1971 | 72 |
| 1972 | 30 |
| 1973 | 43 |
| 1974 | 14 |
| 1975 | 18 |
| 1976 | 6 |
| 1977 | 6 |
| 1979 | 5 |