| Year | Count |
|---|---|
| 1918 | 5 |
| 1919 | 6 |
| 1923 | 5 |
| 1968 | 5 |
| 1970 | 6 |
| 1971 | 18 |
| 1972 | 5 |
| 1973 | 11 |
| 1974 | 8 |
| 1975 | 7 |
| 1976 | 11 |
| 1977 | 13 |
| 1978 | 6 |
| 1979 | 15 |
| 1980 | 13 |
| 1981 | 5 |
| 1988 | 5 |
| 1989 | 5 |
| 1990 | 8 |
| 1991 | 5 |
| 1992 | 5 |
| 1995 | 5 |
| 1997 | 8 |
| 1998 | 11 |
| 1999 | 10 |
| 2000 | 23 |
| 2001 | 46 |
| 2002 | 35 |
| 2003 | 24 |
| 2004 | 38 |
| 2005 | 52 |
| 2006 | 47 |
| 2007 | 25 |
| 2008 | 38 |
| 2009 | 31 |
| 2010 | 5 |
| 2011 | 19 |
| 2012 | 11 |
| 2013 | 15 |
| 2014 | 19 |
| 2015 | 30 |
| 2017 | 38 |
| 2018 | 40 |
| 2019 | 29 |
| 2020 | 43 |
| 2021 | 50 |
| 2022 | 64 |
| 2023 | 78 |
| 2024 | 104 |