| Year | Count |
|---|---|
| 1911 | 16 |
| 1912 | 15 |
| 1913 | 38 |
| 1914 | 38 |
| 1915 | 66 |
| 1916 | 79 |
| 1917 | 83 |
| 1918 | 82 |
| 1919 | 49 |
| 1920 | 56 |
| 1921 | 51 |
| 1922 | 49 |
| 1923 | 63 |
| 1924 | 49 |
| 1925 | 86 |
| 1926 | 72 |
| 1927 | 30 |
| 1928 | 55 |
| 1929 | 26 |
| 1930 | 12 |
| 1931 | 25 |
| 1932 | 6 |
| 1933 | 10 |
| 1934 | 6 |
| 1937 | 15 |
| 1946 | 5 |
| 1963 | 6 |
| 1981 | 7 |
| 1991 | 12 |
| 1994 | 5 |
| 1998 | 7 |
| 1999 | 5 |
| 2001 | 6 |
| 2004 | 15 |
| 2005 | 6 |
| 2006 | 22 |
| 2007 | 16 |
| 2008 | 21 |
| 2009 | 58 |
| 2010 | 135 |
| 2011 | 136 |
| 2012 | 80 |
| 2013 | 16 |
| 2014 | 23 |
| 2015 | 41 |
| 2016 | 65 |
| 2017 | 36 |
| 2018 | 18 |
| 2019 | 26 |
| 2020 | 12 |
| 2021 | 30 |
| 2022 | 12 |
| 2023 | 6 |
| 2024 | 10 |