| Year | Count |
|---|---|
| 1916 | 6 |
| 1923 | 6 |
| 1925 | 8 |
| 1926 | 7 |
| 1927 | 13 |
| 1928 | 11 |
| 1929 | 6 |
| 1930 | 8 |
| 1931 | 11 |
| 1932 | 6 |
| 1933 | 7 |
| 1934 | 8 |
| 1935 | 8 |
| 1936 | 6 |
| 1937 | 5 |
| 1938 | 5 |
| 1939 | 8 |
| 1951 | 5 |
| 1952 | 6 |
| 1953 | 5 |
| 1955 | 5 |
| 1956 | 6 |
| 1964 | 5 |
| 1969 | 8 |
| 1970 | 9 |
| 1971 | 6 |
| 1973 | 9 |
| 1974 | 9 |
| 1977 | 9 |
| 1978 | 8 |
| 1980 | 6 |
| 1983 | 7 |
| 1985 | 14 |
| 1987 | 8 |
| 1988 | 5 |
| 1989 | 10 |
| 1990 | 5 |
| 1991 | 5 |
| 1992 | 6 |
| 1995 | 7 |
| 1998 | 7 |
| 1999 | 7 |