| Year | Count |
|---|---|
| 1917 | 5 |
| 1924 | 6 |
| 1928 | 5 |
| 1929 | 6 |
| 1929 | 5 |
| 1931 | 5 |
| 1932 | 21 |
| 1933 | 12 |
| 1935 | 5 |
| 1937 | 5 |
| 1938 | 10 |
| 1940 | 10 |
| 1941 | 6 |
| 1942 | 5 |
| 1943 | 6 |
| 1943 | 5 |
| 1944 | 5 |
| 1944 | 6 |
| 1946 | 6 |
| 1947 | 6 |
| 1948 | 5 |
| 1949 | 8 |
| 1950 | 6 |
| 1950 | 7 |
| 1955 | 5 |
| 1956 | 8 |
| 1957 | 5 |
| 1959 | 10 |
| 1960 | 5 |
| 1961 | 43 |
| 1962 | 99 |
| 1963 | 117 |
| 1964 | 184 |
| 1965 | 147 |
| 1966 | 27 |
| 1967 | 47 |
| 1968 | 10 |
| 1969 | 5 |
| 1970 | 18 |
| 1971 | 5 |
| 1973 | 45 |
| 1974 | 22 |
| 1975 | 17 |
| 1976 | 5 |
| 1979 | 10 |
| 1980 | 13 |
| 1981 | 28 |
| 1982 | 12 |
| 1983 | 31 |
| 1984 | 15 |
| 1985 | 33 |
| 1986 | 28 |
| 1987 | 13 |
| 1988 | 5 |
| 1989 | 24 |
| 1990 | 5 |
| 1991 | 42 |
| 1992 | 5 |
| 1998 | 5 |
| 2006 | 10 |