| Year | Count |
|---|---|
| 1919 | 10 |
| 1924 | 5 |
| 1943 | 6 |
| 1946 | 5 |
| 1973 | 5 |
| 1977 | 8 |
| 1981 | 5 |
| 1985 | 20 |
| 1986 | 6 |
| 1987 | 6 |
| 1988 | 5 |
| 1989 | 7 |
| 1991 | 6 |
| 1992 | 5 |
| 1993 | 5 |
| 1994 | 16 |
| 1995 | 6 |
| 1996 | 10 |
| 1997 | 12 |
| 1998 | 10 |
| 2000 | 12 |
| 2003 | 5 |
| 2006 | 11 |
| 2007 | 6 |
| 2008 | 10 |
| 2008 | 26 |
| 2009 | 5 |
| 2009 | 45 |
| 2010 | 7 |
| 2010 | 130 |
| 2011 | 7 |
| 2011 | 138 |
| 2012 | 18 |
| 2012 | 211 |
| 2013 | 154 |
| 2014 | 25 |
| 2014 | 273 |
| 2015 | 71 |
| 2015 | 361 |
| 2016 | 72 |
| 2016 | 611 |
| 2017 | 68 |
| 2017 | 459 |
| 2018 | 58 |
| 2018 | 457 |
| 2019 | 59 |
| 2019 | 505 |
| 2020 | 228 |
| 2020 | 406 |
| 2021 | 205 |
| 2021 | 448 |
| 2022 | 145 |
| 2022 | 351 |
| 2023 | 93 |
| 2023 | 238 |
| 2024 | 62 |
| 2024 | 185 |