| Year | Count |
|---|---|
| 1910 | 9 |
| 1911 | 9 |
| 1913 | 9 |
| 1914 | 15 |
| 1915 | 13 |
| 1916 | 17 |
| 1917 | 27 |
| 1918 | 26 |
| 1919 | 10 |
| 1920 | 10 |
| 1921 | 8 |
| 1922 | 16 |
| 1923 | 14 |
| 1925 | 14 |
| 1927 | 14 |
| 1928 | 9 |
| 1929 | 7 |
| 1930 | 6 |
| 1931 | 6 |
| 1932 | 27 |
| 1933 | 19 |
| 1934 | 8 |
| 1935 | 5 |
| 1936 | 14 |
| 1937 | 15 |
| 1938 | 8 |
| 1939 | 7 |
| 1940 | 13 |
| 1941 | 7 |
| 1943 | 23 |
| 1949 | 5 |
| 1950 | 8 |
| 1951 | 23 |
| 1952 | 10 |
| 1953 | 19 |
| 1954 | 14 |
| 1955 | 15 |
| 1956 | 11 |
| 1957 | 13 |
| 1958 | 11 |
| 1959 | 12 |
| 1960 | 6 |
| 1965 | 6 |
| 1967 | 5 |
| 1970 | 7 |
| 2000 | 5 |
| 2007 | 11 |
| 2008 | 6 |
| 2009 | 6 |
| 2010 | 7 |
| 2011 | 8 |
| 2012 | 5 |
| 2013 | 9 |
| 2015 | 21 |
| 2016 | 24 |
| 2017 | 24 |
| 2018 | 12 |
| 2019 | 21 |
| 2020 | 16 |
| 2021 | 20 |
| 2022 | 14 |
| 2023 | 16 |
| 2024 | 40 |