| Year | Count |
|---|---|
| 1915 | 5 |
| 1917 | 10 |
| 1922 | 10 |
| 1925 | 10 |
| 1944 | 6 |
| 1954 | 10 |
| 1962 | 5 |
| 1978 | 5 |
| 1980 | 12 |
| 1981 | 6 |
| 1983 | 12 |
| 1984 | 10 |
| 1988 | 15 |
| 1989 | 6 |
| 1992 | 12 |
| 1994 | 6 |
| 1997 | 5 |
| 2000 | 10 |
| 2001 | 8 |
| 2002 | 10 |
| 2003 | 24 |
| 2005 | 10 |
| 2006 | 8 |
| 2007 | 10 |
| 2011 | 20 |
| 2013 | 19 |
| 2015 | 18 |
| 2016 | 6 |
| 2017 | 18 |
| 2018 | 5 |
| 2019 | 14 |
| 2020 | 12 |
| 2021 | 16 |
| 2022 | 15 |
| 2023 | 14 |
| 2024 | 18 |