| Year | Count |
|---|---|
| 1944 | 5 |
| 1956 | 8 |
| 1962 | 7 |
| 1963 | 6 |
| 1979 | 14 |
| 1982 | 5 |
| 1984 | 7 |
| 1990 | 5 |
| 1991 | 5 |
| 1992 | 9 |
| 1993 | 13 |
| 1996 | 6 |
| 1998 | 12 |
| 1999 | 6 |
| 2000 | 9 |
| 2001 | 13 |
| 2003 | 10 |
| 2004 | 7 |
| 2006 | 11 |
| 2008 | 5 |
| 2009 | 6 |
| 2010 | 6 |
| 2012 | 8 |
| 2013 | 13 |
| 2014 | 11 |
| 2015 | 30 |
| 2016 | 36 |
| 2017 | 21 |
| 2018 | 17 |
| 2019 | 32 |
| 2020 | 24 |
| 2021 | 24 |
| 2022 | 20 |
| 2023 | 14 |