| Year | Count |
|---|---|
| 1944 | 7 |
| 1945 | 6 |
| 1948 | 12 |
| 1949 | 7 |
| 1950 | 5 |
| 1955 | 22 |
| 1956 | 10 |
| 1957 | 19 |
| 1960 | 12 |
| 1961 | 5 |
| 1963 | 12 |
| 1964 | 5 |
| 1965 | 14 |
| 1966 | 10 |
| 1969 | 5 |
| 1982 | 10 |
| 1995 | 5 |
| 2003 | 10 |
| 2004 | 17 |
| 2005 | 22 |
| 2006 | 11 |
| 2007 | 44 |
| 2008 | 40 |
| 2009 | 24 |
| 2010 | 29 |
| 2011 | 32 |
| 2012 | 21 |
| 2013 | 6 |
| 2015 | 28 |
| 2016 | 39 |
| 2017 | 7 |
| 2018 | 5 |
| 2019 | 5 |
| 2023 | 6 |