| Year | Count |
|---|---|
| 1912 | 5 |
| 1917 | 7 |
| 1921 | 5 |
| 1922 | 6 |
| 1923 | 8 |
| 1925 | 5 |
| 1926 | 8 |
| 1927 | 6 |
| 1928 | 6 |
| 1929 | 10 |
| 1930 | 15 |
| 1931 | 7 |
| 1932 | 10 |
| 1933 | 20 |
| 1934 | 5 |
| 1935 | 33 |
| 1936 | 9 |
| 1937 | 9 |
| 1938 | 11 |
| 1942 | 7 |
| 1948 | 7 |
| 1950 | 17 |
| 1951 | 6 |
| 1952 | 19 |
| 1953 | 30 |
| 1954 | 18 |
| 1955 | 25 |
| 1956 | 20 |
| 1957 | 18 |
| 1958 | 26 |
| 1959 | 26 |
| 1960 | 33 |
| 1961 | 39 |
| 1962 | 61 |
| 1963 | 49 |
| 1964 | 49 |
| 1965 | 54 |
| 1966 | 27 |
| 1967 | 60 |
| 1968 | 44 |
| 1969 | 50 |
| 1970 | 54 |
| 1971 | 41 |
| 1972 | 30 |
| 1973 | 20 |
| 1974 | 26 |
| 1975 | 24 |
| 1976 | 38 |
| 1977 | 38 |
| 1978 | 30 |
| 1979 | 7 |
| 1980 | 21 |
| 1981 | 6 |
| 1982 | 19 |
| 1983 | 32 |
| 1985 | 12 |
| 1987 | 20 |
| 1988 | 12 |
| 1990 | 10 |
| 1997 | 9 |
| 2002 | 5 |
| 2005 | 22 |
| 2006 | 8 |