| Year | Count |
|---|---|
| 1913 | 7 |
| 1914 | 8 |
| 1915 | 11 |
| 1916 | 8 |
| 1917 | 17 |
| 1918 | 10 |
| 1919 | 10 |
| 1920 | 13 |
| 1921 | 16 |
| 1922 | 20 |
| 1923 | 32 |
| 1924 | 12 |
| 1925 | 34 |
| 1926 | 22 |
| 1927 | 24 |
| 1928 | 24 |
| 1929 | 22 |
| 1931 | 11 |
| 1932 | 8 |
| 1936 | 5 |
| 1937 | 6 |
| 1941 | 5 |
| 1942 | 5 |
| 1949 | 6 |
| 1950 | 5 |
| 1954 | 6 |
| 1958 | 10 |
| 1960 | 12 |
| 1963 | 7 |
| 1970 | 5 |
| 1973 | 5 |
| 1975 | 7 |
| 1976 | 12 |
| 1981 | 11 |
| 1982 | 10 |
| 1985 | 6 |
| 1988 | 5 |
| 1989 | 5 |
| 1991 | 5 |
| 2005 | 5 |
| 2010 | 6 |
| 2015 | 15 |
| 2016 | 30 |
| 2017 | 36 |
| 2018 | 14 |
| 2019 | 22 |
| 2020 | 12 |
| 2021 | 30 |
| 2022 | 14 |
| 2023 | 18 |
| 2024 | 22 |