| Year | Count |
|---|---|
| 1914 | 5 |
| 1919 | 12 |
| 1920 | 5 |
| 1921 | 10 |
| 1925 | 5 |
| 1927 | 25 |
| 1932 | 5 |
| 1933 | 5 |
| 1935 | 16 |
| 1936 | 22 |
| 1939 | 5 |
| 1940 | 6 |
| 1942 | 32 |
| 1943 | 62 |
| 1944 | 15 |
| 1945 | 17 |
| 1946 | 55 |
| 1947 | 73 |
| 1948 | 48 |
| 1949 | 85 |
| 1950 | 47 |
| 1951 | 79 |
| 1952 | 46 |
| 1953 | 41 |
| 1954 | 36 |
| 1955 | 20 |
| 1956 | 54 |
| 1957 | 45 |
| 1958 | 35 |
| 1959 | 19 |
| 1960 | 64 |
| 1961 | 45 |
| 1962 | 21 |
| 1963 | 26 |
| 1964 | 25 |
| 1965 | 34 |
| 1966 | 11 |
| 1967 | 12 |
| 1968 | 27 |
| 1969 | 5 |