| Year | Count |
|---|---|
| 1910 | 7 |
| 1911 | 7 |
| 1912 | 29 |
| 1913 | 62 |
| 1914 | 89 |
| 1915 | 166 |
| 1916 | 210 |
| 1917 | 205 |
| 1918 | 241 |
| 1919 | 193 |
| 1920 | 167 |
| 1921 | 133 |
| 1922 | 127 |
| 1923 | 135 |
| 1924 | 91 |
| 1925 | 77 |
| 1926 | 101 |
| 1927 | 78 |
| 1928 | 44 |
| 1929 | 27 |
| 1930 | 24 |
| 1931 | 52 |
| 1932 | 34 |
| 1933 | 18 |
| 1934 | 9 |
| 1935 | 5 |
| 1936 | 10 |
| 1937 | 7 |
| 1939 | 12 |
| 1941 | 10 |
| 1946 | 12 |
| 1947 | 5 |
| 1948 | 5 |
| 1951 | 11 |
| 1956 | 12 |
| 2002 | 6 |
| 2004 | 38 |
| 2005 | 52 |
| 2006 | 29 |
| 2007 | 64 |
| 2008 | 117 |
| 2009 | 144 |
| 2010 | 192 |
| 2011 | 201 |
| 2012 | 180 |
| 2013 | 178 |
| 2014 | 256 |
| 2015 | 318 |
| 2016 | 265 |
| 2017 | 227 |
| 2018 | 225 |
| 2019 | 175 |
| 2020 | 220 |
| 2021 | 177 |
| 2022 | 173 |
| 2023 | 190 |
| 2024 | 123 |