| Year | Count |
|---|---|
| 1917 | 5 |
| 1919 | 5 |
| 1927 | 5 |
| 1930 | 10 |
| 1932 | 8 |
| 1934 | 8 |
| 1935 | 8 |
| 1936 | 8 |
| 1938 | 5 |
| 1940 | 7 |
| 1942 | 5 |
| 1943 | 9 |
| 1946 | 16 |
| 1947 | 7 |
| 1949 | 10 |
| 1952 | 6 |
| 1954 | 5 |
| 1955 | 10 |
| 1963 | 5 |
| 1964 | 5 |
| 1966 | 5 |
| 1968 | 21 |
| 1969 | 9 |
| 1970 | 28 |
| 1971 | 13 |
| 1972 | 10 |
| 1973 | 13 |
| 1974 | 18 |
| 1975 | 32 |
| 1976 | 14 |
| 1977 | 19 |
| 1978 | 21 |
| 1979 | 19 |
| 1980 | 7 |
| 1981 | 5 |
| 1986 | 12 |
| 1990 | 5 |
| 2004 | 20 |
| 2005 | 51 |
| 2006 | 29 |
| 2007 | 29 |
| 2008 | 12 |
| 2009 | 10 |
| 2010 | 15 |
| 2011 | 18 |
| 2012 | 5 |
| 2015 | 9 |
| 2017 | 6 |
| 2018 | 17 |
| 2019 | 29 |
| 2020 | 6 |
| 2021 | 70 |
| 2022 | 168 |
| 2023 | 165 |
| 2024 | 262 |