| Year | Count |
|---|---|
| 1913 | 6 |
| 1917 | 6 |
| 1918 | 6 |
| 1923 | 5 |
| 1925 | 7 |
| 1926 | 9 |
| 1927 | 10 |
| 1928 | 10 |
| 1929 | 13 |
| 1930 | 17 |
| 1931 | 16 |
| 1932 | 25 |
| 1933 | 14 |
| 1934 | 13 |
| 1935 | 15 |
| 1936 | 8 |
| 1937 | 14 |
| 1938 | 18 |
| 1939 | 11 |
| 1940 | 11 |
| 1941 | 12 |
| 1942 | 15 |
| 1943 | 9 |
| 1944 | 7 |
| 1945 | 8 |
| 1947 | 5 |
| 1949 | 5 |
| 1953 | 7 |
| 1956 | 10 |
| 1957 | 7 |
| 1958 | 6 |
| 1959 | 9 |
| 1960 | 10 |
| 1961 | 9 |
| 1963 | 7 |
| 1964 | 11 |
| 1965 | 11 |
| 1967 | 7 |
| 1968 | 5 |
| 1969 | 10 |