| Year | Count |
|---|---|
| 1916 | 6 |
| 1920 | 8 |
| 1923 | 9 |
| 1924 | 10 |
| 1925 | 14 |
| 1926 | 10 |
| 1928 | 7 |
| 1929 | 7 |
| 1930 | 10 |
| 1939 | 5 |
| 1940 | 7 |
| 1941 | 7 |
| 1942 | 5 |
| 1943 | 5 |
| 1944 | 9 |
| 1945 | 5 |
| 1947 | 36 |
| 1948 | 7 |
| 1955 | 15 |
| 1956 | 22 |
| 1957 | 10 |
| 1958 | 12 |
| 1959 | 18 |
| 1960 | 10 |
| 1962 | 14 |
| 1964 | 10 |
| 1965 | 12 |
| 1968 | 12 |
| 1969 | 6 |
| 1970 | 5 |
| 1972 | 8 |
| 1974 | 10 |
| 1977 | 15 |
| 1978 | 10 |
| 1979 | 6 |
| 1980 | 5 |
| 1981 | 11 |
| 1982 | 6 |
| 1983 | 7 |
| 1985 | 8 |
| 1986 | 6 |
| 1987 | 8 |
| 1992 | 8 |
| 1994 | 6 |
| 1995 | 6 |
| 1997 | 8 |
| 1999 | 7 |
| 2000 | 7 |
| 2001 | 6 |
| 2006 | 8 |
| 2007 | 6 |
| 2008 | 5 |
| 2009 | 7 |
| 2012 | 10 |
| 2020 | 5 |