| Year | Count |
|---|---|
| 1915 | 5 |
| 1916 | 8 |
| 1917 | 7 |
| 1918 | 7 |
| 1919 | 10 |
| 1922 | 6 |
| 1923 | 5 |
| 1925 | 18 |
| 1929 | 5 |
| 1934 | 5 |
| 1948 | 20 |
| 1949 | 23 |
| 1950 | 24 |
| 1951 | 42 |
| 1952 | 13 |
| 1953 | 61 |
| 1954 | 69 |
| 1955 | 21 |
| 1956 | 19 |
| 1957 | 43 |
| 1958 | 29 |
| 1959 | 16 |
| 1960 | 23 |
| 1961 | 10 |
| 1962 | 15 |
| 1963 | 5 |
| 1965 | 5 |
| 1971 | 5 |
| 1976 | 12 |
| 1982 | 5 |
| 1983 | 5 |
| 1984 | 6 |
| 1988 | 10 |