| Year | Count |
|---|---|
| 1914 | 5 |
| 1915 | 5 |
| 1916 | 18 |
| 1918 | 21 |
| 1919 | 15 |
| 1920 | 23 |
| 1921 | 26 |
| 1923 | 21 |
| 1924 | 15 |
| 1925 | 24 |
| 1926 | 6 |
| 1927 | 19 |
| 1929 | 7 |
| 1931 | 6 |
| 1932 | 24 |
| 1933 | 12 |
| 1934 | 12 |
| 1935 | 59 |
| 1937 | 21 |
| 1938 | 42 |
| 1939 | 5 |
| 1939 | 18 |
| 1940 | 19 |
| 1941 | 5 |
| 1942 | 24 |
| 1943 | 48 |
| 1944 | 47 |
| 1945 | 31 |
| 1946 | 55 |
| 1947 | 64 |
| 1948 | 37 |
| 1949 | 60 |
| 1950 | 43 |
| 1951 | 57 |
| 1952 | 32 |
| 1953 | 60 |
| 1954 | 27 |
| 1955 | 57 |
| 1956 | 60 |
| 1957 | 40 |
| 1958 | 84 |
| 1959 | 54 |
| 1960 | 35 |
| 1961 | 18 |
| 1962 | 19 |
| 1963 | 28 |
| 1964 | 7 |
| 1965 | 22 |
| 1966 | 20 |
| 1967 | 13 |
| 1968 | 5 |
| 1969 | 34 |
| 1971 | 15 |
| 1976 | 10 |
| 1978 | 5 |