| Year | Count |
|---|---|
| 1912 | 7 |
| 1913 | 10 |
| 1914 | 6 |
| 1915 | 10 |
| 1916 | 10 |
| 1917 | 9 |
| 1919 | 7 |
| 1920 | 8 |
| 1922 | 7 |
| 1923 | 10 |
| 1924 | 6 |
| 1926 | 7 |
| 1928 | 9 |
| 1930 | 5 |
| 1934 | 5 |
| 1935 | 5 |
| 1947 | 5 |
| 1950 | 5 |
| 1960 | 6 |
| 1961 | 6 |
| 1963 | 7 |
| 1965 | 5 |
| 1969 | 5 |
| 1970 | 6 |
| 1971 | 6 |
| 1973 | 5 |
| 1976 | 5 |
| 1978 | 5 |
| 1988 | 5 |
| 1990 | 9 |
| 1992 | 6 |
| 1996 | 5 |
| 1998 | 7 |
| 2004 | 7 |
| 2009 | 5 |