| Year | Count |
|---|---|
| 1922 | 17 |
| 1923 | 10 |
| 1925 | 7 |
| 1934 | 5 |
| 1936 | 10 |
| 1942 | 5 |
| 1972 | 5 |
| 1979 | 6 |
| 1981 | 5 |
| 1982 | 5 |
| 1983 | 6 |
| 1986 | 5 |
| 1987 | 15 |
| 1988 | 11 |
| 1989 | 5 |
| 1991 | 5 |
| 1992 | 10 |
| 1993 | 15 |
| 1994 | 7 |
| 1995 | 20 |
| 1996 | 23 |
| 1997 | 16 |
| 1998 | 39 |
| 1999 | 17 |
| 2000 | 38 |
| 2001 | 16 |
| 2002 | 22 |
| 2003 | 53 |
| 2004 | 70 |
| 2005 | 73 |
| 2006 | 57 |
| 2007 | 94 |
| 2008 | 145 |
| 2009 | 156 |
| 2010 | 187 |
| 2011 | 190 |
| 2012 | 295 |
| 2013 | 225 |
| 2014 | 254 |
| 2015 | 317 |
| 2016 | 310 |
| 2017 | 279 |
| 2018 | 234 |
| 2019 | 173 |
| 2020 | 171 |
| 2021 | 188 |
| 2022 | 136 |
| 2023 | 198 |
| 2024 | 125 |