| Year | Count |
|---|---|
| 1912 | 5 |
| 1913 | 5 |
| 1914 | 6 |
| 1915 | 18 |
| 1916 | 32 |
| 1917 | 33 |
| 1918 | 17 |
| 1919 | 17 |
| 1920 | 11 |
| 1921 | 28 |
| 1924 | 19 |
| 1925 | 26 |
| 1926 | 28 |
| 1927 | 10 |
| 1928 | 12 |
| 1929 | 5 |
| 1930 | 7 |
| 1931 | 28 |
| 1933 | 23 |
| 1934 | 11 |
| 1935 | 8 |
| 1941 | 7 |
| 1947 | 10 |
| 1948 | 5 |
| 1956 | 5 |
| 1957 | 5 |
| 1962 | 8 |
| 1966 | 5 |
| 1971 | 7 |
| 1974 | 6 |
| 1981 | 8 |
| 1982 | 11 |
| 1983 | 7 |
| 1985 | 24 |
| 1986 | 7 |
| 1988 | 6 |
| 1989 | 7 |
| 1991 | 5 |
| 1992 | 10 |