| Year | Count |
|---|---|
| 1925 | 26 |
| 1926 | 18 |
| 1927 | 16 |
| 1928 | 18 |
| 1929 | 24 |
| 1930 | 22 |
| 1931 | 12 |
| 1932 | 24 |
| 1933 | 18 |
| 1934 | 10 |
| 1935 | 9 |
| 1936 | 13 |
| 1937 | 15 |
| 1938 | 7 |
| 1939 | 11 |
| 1940 | 9 |
| 1941 | 15 |
| 1942 | 7 |
| 1943 | 16 |
| 1944 | 7 |
| 1945 | 8 |
| 1946 | 7 |
| 1947 | 10 |
| 1948 | 10 |
| 1949 | 8 |
| 1950 | 8 |
| 1952 | 8 |
| 1954 | 7 |
| 1964 | 7 |
| 1965 | 7 |
| 1967 | 5 |
| 1969 | 5 |
| 1970 | 8 |
| 1971 | 11 |
| 1972 | 9 |
| 1973 | 9 |
| 1977 | 12 |
| 1991 | 5 |
| 2004 | 5 |