| Year | Count |
|---|---|
| 1917 | 26 |
| 1918 | 20 |
| 1919 | 16 |
| 1920 | 12 |
| 1921 | 12 |
| 1922 | 26 |
| 1923 | 24 |
| 1924 | 20 |
| 1925 | 30 |
| 1926 | 14 |
| 1927 | 14 |
| 1928 | 18 |
| 1929 | 12 |
| 1930 | 10 |
| 1933 | 12 |
| 1973 | 5 |
| 1977 | 24 |
| 1978 | 103 |
| 1979 | 50 |
| 1980 | 26 |
| 1985 | 5 |
| 1990 | 10 |
| 1991 | 6 |
| 1995 | 5 |
| 1996 | 5 |
| 1997 | 5 |
| 1998 | 5 |
| 1999 | 5 |
| 2000 | 5 |
| 2001 | 11 |
| 2004 | 15 |
| 2005 | 13 |
| 2006 | 51 |
| 2007 | 42 |
| 2008 | 101 |
| 2009 | 67 |
| 2010 | 41 |
| 2011 | 82 |
| 2012 | 49 |
| 2013 | 37 |
| 2014 | 56 |
| 2015 | 52 |
| 2016 | 67 |
| 2017 | 88 |
| 2018 | 91 |
| 2019 | 97 |
| 2020 | 197 |
| 2021 | 344 |
| 2022 | 301 |
| 2023 | 239 |
| 2024 | 216 |