| Year | Count |
|---|---|
| 1916 | 10 |
| 1918 | 19 |
| 1919 | 12 |
| 1920 | 14 |
| 1921 | 17 |
| 1922 | 23 |
| 1923 | 21 |
| 1924 | 29 |
| 1925 | 12 |
| 1926 | 5 |
| 1927 | 11 |
| 1928 | 5 |
| 1929 | 54 |
| 1930 | 9 |
| 1932 | 5 |
| 1934 | 6 |
| 1936 | 6 |
| 1937 | 9 |
| 1938 | 18 |
| 1940 | 10 |
| 1941 | 5 |
| 1942 | 28 |
| 1943 | 7 |
| 1945 | 15 |
| 1946 | 33 |
| 1947 | 16 |
| 1949 | 7 |
| 1950 | 31 |
| 1951 | 19 |
| 1953 | 10 |
| 1954 | 31 |
| 1956 | 19 |
| 1958 | 10 |
| 1959 | 15 |
| 1960 | 20 |
| 1961 | 20 |
| 1962 | 10 |
| 1963 | 12 |
| 1964 | 14 |
| 1967 | 10 |
| 1970 | 5 |
| 1976 | 5 |