| Year | Count |
|---|---|
| 1914 | 5 |
| 1925 | 6 |
| 1929 | 5 |
| 1940 | 6 |
| 1941 | 5 |
| 1946 | 5 |
| 1948 | 7 |
| 1954 | 15 |
| 1955 | 15 |
| 1958 | 10 |
| 1968 | 12 |
| 1971 | 8 |
| 1974 | 5 |
| 1977 | 8 |
| 1978 | 5 |
| 1979 | 9 |
| 1980 | 6 |
| 1983 | 7 |
| 1984 | 8 |
| 1986 | 7 |
| 1987 | 6 |
| 1990 | 7 |
| 1991 | 8 |
| 1992 | 6 |
| 1994 | 10 |
| 1996 | 8 |
| 1997 | 5 |
| 1998 | 6 |
| 2000 | 5 |
| 2003 | 6 |
| 2004 | 10 |
| 2005 | 5 |
| 2006 | 5 |
| 2007 | 14 |
| 2008 | 48 |
| 2009 | 28 |
| 2010 | 20 |
| 2011 | 64 |
| 2012 | 42 |
| 2013 | 28 |
| 2014 | 68 |
| 2015 | 66 |
| 2016 | 74 |
| 2017 | 60 |
| 2018 | 47 |
| 2019 | 48 |
| 2020 | 36 |
| 2021 | 75 |
| 2022 | 37 |
| 2023 | 37 |
| 2024 | 46 |