| Year | Count |
|---|---|
| 1919 | 5 |
| 1923 | 5 |
| 1929 | 14 |
| 1930 | 12 |
| 1931 | 12 |
| 1932 | 10 |
| 1938 | 5 |
| 1950 | 6 |
| 1951 | 9 |
| 1952 | 8 |
| 1953 | 6 |
| 1954 | 7 |
| 1956 | 6 |
| 1957 | 7 |
| 1958 | 6 |
| 1959 | 12 |
| 1967 | 6 |
| 1968 | 6 |
| 1969 | 5 |
| 1971 | 5 |
| 1975 | 7 |
| 1977 | 5 |
| 1979 | 6 |
| 1981 | 7 |
| 1982 | 7 |
| 1985 | 10 |
| 1986 | 16 |
| 1992 | 6 |
| 1996 | 5 |
| 2001 | 5 |
| 2002 | 11 |
| 2003 | 16 |
| 2004 | 31 |
| 2006 | 31 |
| 2008 | 33 |
| 2009 | 10 |
| 2010 | 12 |
| 2011 | 18 |
| 2012 | 21 |
| 2013 | 11 |
| 2014 | 26 |
| 2015 | 47 |
| 2016 | 83 |
| 2017 | 82 |
| 2018 | 67 |
| 2019 | 42 |
| 2020 | 55 |
| 2021 | 36 |
| 2022 | 53 |
| 2023 | 76 |
| 2024 | 58 |