| Year | Count |
|---|---|
| 1915 | 5 |
| 1916 | 11 |
| 1918 | 11 |
| 1919 | 7 |
| 1920 | 5 |
| 1921 | 5 |
| 1922 | 5 |
| 1923 | 6 |
| 1924 | 9 |
| 1925 | 9 |
| 1926 | 6 |
| 1927 | 7 |
| 1928 | 5 |
| 1929 | 7 |
| 1930 | 6 |
| 1931 | 6 |
| 1932 | 11 |
| 1933 | 10 |
| 1935 | 5 |
| 1936 | 5 |
| 1941 | 6 |
| 1942 | 13 |
| 1943 | 8 |
| 1944 | 7 |
| 1946 | 5 |
| 1948 | 5 |
| 1949 | 5 |
| 1950 | 6 |
| 1951 | 8 |
| 1953 | 6 |
| 1954 | 5 |
| 1955 | 6 |
| 1956 | 6 |
| 1958 | 5 |
| 1959 | 6 |
| 1962 | 8 |
| 1963 | 5 |
| 1964 | 6 |
| 1966 | 5 |
| 1970 | 6 |
| 1982 | 5 |
| 1988 | 5 |