| Year | Count |
|---|---|
| 1923 | 6 |
| 1925 | 8 |
| 1926 | 11 |
| 1927 | 14 |
| 1928 | 5 |
| 1929 | 6 |
| 1930 | 8 |
| 1931 | 6 |
| 1933 | 5 |
| 1936 | 6 |
| 1944 | 5 |
| 1952 | 6 |
| 1955 | 6 |
| 1961 | 9 |
| 1966 | 6 |
| 1967 | 7 |
| 1968 | 5 |
| 1973 | 6 |
| 1975 | 5 |
| 1977 | 5 |
| 1980 | 7 |
| 1983 | 5 |
| 1985 | 5 |
| 1988 | 5 |
| 1990 | 8 |
| 1991 | 6 |
| 1995 | 5 |
| 1997 | 9 |
| 1999 | 13 |
| 2000 | 6 |
| 2001 | 7 |
| 2002 | 7 |
| 2003 | 6 |
| 2004 | 8 |
| 2005 | 8 |
| 2006 | 13 |
| 2007 | 19 |
| 2008 | 20 |
| 2009 | 27 |
| 2010 | 12 |
| 2011 | 20 |
| 2012 | 16 |
| 2013 | 30 |
| 2014 | 19 |
| 2015 | 30 |
| 2016 | 76 |
| 2017 | 24 |
| 2018 | 56 |
| 2019 | 72 |
| 2020 | 41 |
| 2021 | 34 |
| 2022 | 49 |
| 2023 | 45 |
| 2024 | 42 |