| Year | Count |
|---|---|
| 1947 | 10 |
| 1948 | 6 |
| 1952 | 10 |
| 1959 | 5 |
| 1961 | 16 |
| 1962 | 7 |
| 1963 | 16 |
| 1964 | 11 |
| 1965 | 11 |
| 1966 | 6 |
| 1967 | 5 |
| 1969 | 24 |
| 1970 | 24 |
| 1971 | 6 |
| 1973 | 6 |
| 1974 | 6 |
| 1975 | 5 |
| 1976 | 5 |
| 1977 | 5 |
| 1980 | 5 |
| 1990 | 6 |
| 1992 | 11 |
| 1993 | 5 |
| 1995 | 17 |
| 1996 | 10 |
| 1998 | 10 |
| 1999 | 6 |
| 2000 | 5 |
| 2001 | 5 |
| 2004 | 11 |
| 2005 | 5 |
| 2006 | 9 |
| 2007 | 17 |
| 2008 | 14 |
| 2009 | 19 |
| 2010 | 7 |
| 2011 | 5 |
| 2013 | 20 |
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 11 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 5 |