| Year | Count |
|---|---|
| 1911 | 10 |
| 1914 | 12 |
| 1915 | 10 |
| 1917 | 10 |
| 1918 | 5 |
| 1921 | 15 |
| 1922 | 15 |
| 1923 | 16 |
| 1925 | 5 |
| 1927 | 12 |
| 1928 | 16 |
| 1931 | 5 |
| 1933 | 12 |
| 1934 | 7 |
| 1935 | 16 |
| 1936 | 19 |
| 1937 | 10 |
| 1938 | 5 |
| 1939 | 5 |
| 1943 | 10 |
| 1945 | 48 |
| 1946 | 153 |
| 1947 | 224 |
| 1948 | 183 |
| 1949 | 96 |
| 1950 | 162 |
| 1951 | 110 |
| 1952 | 142 |
| 1953 | 122 |
| 1954 | 129 |
| 1955 | 86 |
| 1956 | 105 |
| 1957 | 68 |
| 1958 | 48 |
| 1959 | 40 |
| 1960 | 73 |
| 1961 | 105 |
| 1962 | 48 |
| 1963 | 97 |
| 1964 | 24 |
| 1965 | 88 |
| 1966 | 64 |
| 1967 | 26 |
| 1968 | 35 |
| 1969 | 5 |
| 1970 | 16 |
| 1971 | 39 |
| 1972 | 29 |
| 1973 | 31 |
| 1974 | 5 |
| 1977 | 5 |
| 1981 | 12 |