| Year | Count |
|---|---|
| 1915 | 5 |
| 1918 | 6 |
| 1934 | 5 |
| 1968 | 5 |
| 1972 | 6 |
| 1975 | 5 |
| 1976 | 10 |
| 1977 | 20 |
| 1978 | 12 |
| 1979 | 18 |
| 1981 | 5 |
| 1982 | 9 |
| 1983 | 8 |
| 1984 | 7 |
| 1985 | 9 |
| 1987 | 11 |
| 1988 | 8 |
| 1989 | 5 |
| 1990 | 6 |
| 1992 | 6 |
| 1993 | 9 |
| 1994 | 9 |
| 1995 | 6 |
| 1996 | 17 |
| 1997 | 12 |
| 1998 | 8 |
| 1999 | 11 |
| 2000 | 18 |
| 2001 | 10 |
| 2002 | 16 |
| 2003 | 14 |
| 2004 | 15 |
| 2005 | 13 |
| 2006 | 16 |
| 2007 | 19 |
| 2008 | 16 |
| 2009 | 15 |
| 2010 | 20 |
| 2011 | 20 |
| 2012 | 16 |
| 2013 | 17 |
| 2014 | 23 |
| 2015 | 23 |
| 2016 | 60 |
| 2017 | 66 |
| 2018 | 21 |
| 2019 | 38 |
| 2020 | 48 |
| 2021 | 58 |
| 2022 | 74 |
| 2023 | 66 |
| 2024 | 64 |