| Year | Count |
|---|---|
| 1915 | 10 |
| 1916 | 10 |
| 1918 | 16 |
| 1919 | 12 |
| 1920 | 9 |
| 1922 | 12 |
| 1923 | 9 |
| 1924 | 26 |
| 1925 | 23 |
| 1926 | 22 |
| 1927 | 53 |
| 1928 | 54 |
| 1929 | 60 |
| 1930 | 64 |
| 1931 | 62 |
| 1932 | 44 |
| 1933 | 36 |
| 1934 | 35 |
| 1935 | 66 |
| 1936 | 28 |
| 1937 | 13 |
| 1938 | 30 |
| 1939 | 23 |
| 1940 | 21 |
| 1941 | 15 |
| 1943 | 57 |
| 1950 | 24 |
| 1951 | 23 |
| 1952 | 28 |
| 1953 | 29 |
| 1954 | 23 |
| 1955 | 24 |
| 1956 | 25 |
| 1957 | 22 |
| 1958 | 20 |
| 1959 | 14 |
| 1960 | 27 |
| 1961 | 19 |
| 1967 | 6 |
| 1968 | 8 |
| 1969 | 7 |
| 1970 | 13 |
| 1971 | 11 |
| 1972 | 13 |
| 1973 | 10 |
| 1974 | 12 |
| 1975 | 9 |
| 1976 | 7 |
| 1977 | 5 |
| 1978 | 5 |
| 1979 | 12 |
| 1981 | 10 |
| 1982 | 5 |
| 1997 | 6 |
| 2006 | 5 |