| Year | Count |
|---|---|
| 1914 | 5 |
| 1915 | 5 |
| 1916 | 10 |
| 1918 | 5 |
| 1920 | 15 |
| 1922 | 16 |
| 1923 | 14 |
| 1924 | 18 |
| 1925 | 12 |
| 1926 | 12 |
| 1927 | 18 |
| 1928 | 32 |
| 1929 | 14 |
| 1931 | 5 |
| 1932 | 9 |
| 1933 | 8 |
| 1934 | 5 |
| 1935 | 8 |
| 1948 | 6 |
| 1952 | 5 |
| 1955 | 13 |
| 1956 | 5 |
| 1957 | 16 |
| 1958 | 20 |
| 1959 | 24 |
| 1960 | 18 |
| 1961 | 6 |
| 1962 | 11 |
| 1963 | 9 |
| 1964 | 5 |
| 1965 | 17 |
| 1966 | 7 |
| 1967 | 5 |
| 1968 | 6 |
| 1969 | 6 |
| 1972 | 8 |
| 1973 | 6 |
| 1975 | 6 |
| 1976 | 12 |