| Year | Count |
|---|---|
| 1918 | 12 |
| 1919 | 5 |
| 1921 | 8 |
| 1922 | 5 |
| 1924 | 6 |
| 1925 | 11 |
| 1926 | 5 |
| 1927 | 12 |
| 1928 | 18 |
| 1929 | 26 |
| 1930 | 14 |
| 1931 | 14 |
| 1932 | 24 |
| 1933 | 16 |
| 1934 | 6 |
| 1935 | 7 |
| 1936 | 6 |
| 1937 | 7 |
| 1938 | 7 |
| 1939 | 11 |
| 1950 | 10 |
| 1951 | 8 |
| 1953 | 9 |
| 1954 | 6 |
| 1955 | 7 |
| 1956 | 5 |
| 1958 | 7 |
| 1961 | 18 |
| 1966 | 5 |
| 1967 | 14 |
| 1968 | 6 |
| 1969 | 5 |
| 1970 | 16 |
| 1971 | 7 |
| 1972 | 15 |
| 1974 | 5 |
| 1975 | 6 |
| 1977 | 5 |
| 1978 | 5 |
| 1981 | 16 |
| 1983 | 9 |
| 1985 | 12 |
| 1986 | 6 |
| 1987 | 5 |
| 1988 | 5 |
| 1989 | 5 |
| 1993 | 5 |
| 1995 | 6 |
| 1996 | 7 |
| 2004 | 12 |