| Year | Count |
|---|---|
| 1922 | 6 |
| 1925 | 5 |
| 1926 | 6 |
| 1927 | 6 |
| 1928 | 8 |
| 1929 | 10 |
| 1942 | 7 |
| 1943 | 5 |
| 1946 | 9 |
| 1947 | 15 |
| 1948 | 7 |
| 1949 | 7 |
| 1956 | 12 |
| 1957 | 10 |
| 1959 | 16 |
| 1962 | 6 |
| 1963 | 5 |
| 1965 | 5 |
| 1966 | 5 |
| 1970 | 13 |
| 1972 | 15 |
| 1975 | 6 |
| 1976 | 5 |
| 1977 | 8 |
| 1978 | 7 |
| 1979 | 5 |
| 1980 | 9 |
| 1981 | 5 |
| 1982 | 7 |
| 1984 | 6 |
| 1985 | 11 |
| 1986 | 5 |
| 1987 | 8 |
| 1988 | 6 |
| 1989 | 7 |
| 1990 | 5 |
| 1991 | 7 |
| 1992 | 10 |
| 1993 | 5 |
| 1994 | 8 |
| 1996 | 9 |
| 1998 | 17 |
| 1999 | 8 |
| 2000 | 13 |
| 2001 | 16 |
| 2005 | 11 |
| 2006 | 5 |
| 2007 | 12 |
| 2008 | 16 |
| 2010 | 8 |
| 2011 | 12 |
| 2012 | 10 |
| 2013 | 10 |
| 2014 | 16 |
| 2015 | 10 |
| 2016 | 18 |
| 2017 | 5 |
| 2022 | 5 |
| 2023 | 5 |