| Year | Count |
|---|---|
| 1924 | 14 |
| 1928 | 12 |
| 1930 | 16 |
| 1931 | 6 |
| 1933 | 7 |
| 1935 | 5 |
| 1937 | 6 |
| 1938 | 10 |
| 1939 | 7 |
| 1941 | 11 |
| 1942 | 9 |
| 1943 | 10 |
| 1944 | 12 |
| 1945 | 11 |
| 1946 | 10 |
| 1947 | 5 |
| 1948 | 6 |
| 1949 | 12 |
| 1950 | 6 |
| 1951 | 9 |
| 1955 | 6 |
| 1960 | 10 |
| 1969 | 5 |
| 1977 | 14 |
| 1979 | 10 |
| 1981 | 6 |
| 1988 | 5 |
| 1989 | 8 |
| 1991 | 7 |
| 1993 | 5 |
| 2005 | 6 |
| 2007 | 5 |
| 2009 | 5 |
| 2010 | 5 |
| 2013 | 8 |
| 2014 | 10 |
| 2015 | 30 |
| 2016 | 45 |
| 2017 | 39 |
| 2018 | 22 |
| 2019 | 12 |
| 2020 | 22 |
| 2021 | 26 |
| 2022 | 16 |
| 2023 | 14 |
| 2024 | 34 |