| Year | Count |
|---|---|
| 1915 | 5 |
| 1917 | 29 |
| 1918 | 5 |
| 1919 | 36 |
| 1920 | 16 |
| 1921 | 16 |
| 1922 | 34 |
| 1923 | 11 |
| 1924 | 17 |
| 1925 | 11 |
| 1926 | 13 |
| 1927 | 14 |
| 1928 | 7 |
| 1929 | 5 |
| 1930 | 5 |
| 1934 | 5 |
| 1960 | 10 |
| 1963 | 5 |
| 1964 | 5 |
| 1965 | 5 |
| 1967 | 6 |
| 1968 | 9 |
| 1969 | 8 |
| 1970 | 12 |
| 1971 | 15 |
| 1972 | 6 |
| 1973 | 15 |
| 1974 | 12 |
| 1975 | 13 |
| 1976 | 6 |
| 1977 | 20 |
| 1979 | 13 |
| 1980 | 9 |
| 1981 | 6 |
| 1982 | 5 |
| 1983 | 10 |
| 1984 | 6 |
| 1987 | 12 |
| 1995 | 5 |
| 1996 | 9 |
| 1997 | 6 |