| Year | Count |
|---|---|
| 1910 | 6 |
| 1915 | 5 |
| 1917 | 5 |
| 1920 | 5 |
| 1922 | 12 |
| 1923 | 7 |
| 1924 | 13 |
| 1925 | 10 |
| 1926 | 8 |
| 1932 | 6 |
| 1933 | 5 |
| 1934 | 6 |
| 1935 | 5 |
| 1936 | 11 |
| 1937 | 19 |
| 1938 | 11 |
| 1939 | 17 |
| 1940 | 13 |
| 1941 | 6 |
| 1942 | 7 |
| 1943 | 5 |
| 1948 | 5 |
| 1950 | 5 |
| 1951 | 6 |
| 1953 | 9 |
| 1954 | 8 |
| 1955 | 7 |
| 1956 | 6 |
| 1958 | 8 |
| 1959 | 6 |
| 1960 | 9 |
| 1961 | 9 |
| 1967 | 8 |
| 1968 | 11 |
| 1969 | 8 |
| 1970 | 10 |
| 1971 | 14 |
| 1972 | 5 |
| 1973 | 8 |
| 1975 | 6 |
| 1976 | 7 |
| 1978 | 9 |
| 1980 | 6 |
| 1981 | 8 |
| 1986 | 12 |
| 2003 | 10 |
| 2004 | 10 |
| 2005 | 10 |