| Year | Count |
|---|---|
| 1910 | 15 |
| 1911 | 24 |
| 1912 | 19 |
| 1913 | 26 |
| 1914 | 25 |
| 1915 | 81 |
| 1916 | 84 |
| 1917 | 86 |
| 1918 | 99 |
| 1919 | 116 |
| 1920 | 110 |
| 1921 | 57 |
| 1922 | 60 |
| 1923 | 55 |
| 1924 | 80 |
| 1925 | 87 |
| 1926 | 58 |
| 1927 | 46 |
| 1928 | 34 |
| 1929 | 7 |
| 1930 | 31 |
| 1931 | 29 |
| 1932 | 21 |
| 1933 | 8 |
| 1934 | 6 |
| 1935 | 10 |
| 1936 | 17 |
| 1939 | 5 |
| 1940 | 10 |
| 1946 | 10 |
| 1947 | 6 |
| 1951 | 6 |
| 1952 | 8 |
| 1953 | 12 |
| 1955 | 5 |
| 1956 | 10 |
| 1957 | 5 |
| 1959 | 6 |
| 1961 | 7 |
| 2008 | 10 |
| 2009 | 5 |
| 2010 | 20 |
| 2011 | 12 |
| 2012 | 24 |
| 2013 | 17 |
| 2014 | 16 |
| 2015 | 21 |
| 2016 | 15 |
| 2017 | 21 |
| 2018 | 10 |
| 2019 | 9 |
| 2020 | 12 |
| 2021 | 14 |
| 2023 | 7 |