| Year | Count |
|---|---|
| 1923 | 5 |
| 1940 | 6 |
| 1946 | 6 |
| 1947 | 18 |
| 1949 | 8 |
| 1955 | 24 |
| 1956 | 12 |
| 1957 | 14 |
| 1958 | 21 |
| 1959 | 12 |
| 1962 | 10 |
| 1965 | 23 |
| 1966 | 10 |
| 1967 | 14 |
| 1968 | 10 |
| 1969 | 7 |
| 1970 | 11 |
| 1972 | 5 |
| 1976 | 7 |
| 1977 | 6 |
| 1979 | 5 |
| 1981 | 9 |
| 1982 | 12 |
| 1983 | 9 |
| 1985 | 5 |
| 1986 | 11 |
| 1987 | 5 |
| 1988 | 6 |
| 1989 | 8 |
| 1990 | 5 |
| 1991 | 9 |
| 1993 | 10 |
| 1994 | 8 |
| 1995 | 9 |
| 1996 | 18 |
| 1997 | 12 |
| 1998 | 7 |
| 1999 | 6 |
| 2000 | 11 |
| 2001 | 20 |
| 2005 | 5 |
| 2006 | 7 |
| 2007 | 12 |
| 2008 | 39 |
| 2009 | 10 |
| 2010 | 5 |
| 2011 | 20 |
| 2012 | 10 |
| 2014 | 24 |
| 2015 | 12 |
| 2016 | 24 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 9 |
| 2020 | 13 |
| 2021 | 10 |
| 2023 | 12 |
| 2024 | 9 |