| Year | Count |
|---|---|
| 1918 | 6 |
| 1920 | 8 |
| 1922 | 14 |
| 1923 | 10 |
| 1924 | 12 |
| 1925 | 10 |
| 1926 | 10 |
| 1928 | 14 |
| 1933 | 5 |
| 1934 | 5 |
| 1935 | 6 |
| 1937 | 5 |
| 1938 | 6 |
| 1939 | 5 |
| 1940 | 7 |
| 1941 | 11 |
| 1942 | 6 |
| 1944 | 8 |
| 1946 | 9 |
| 1947 | 7 |
| 1948 | 6 |
| 1949 | 12 |
| 1950 | 9 |
| 1951 | 9 |
| 1952 | 11 |
| 1954 | 7 |
| 1957 | 18 |
| 1958 | 12 |
| 1961 | 6 |
| 1962 | 6 |
| 1963 | 8 |
| 1964 | 6 |
| 1965 | 6 |