| Year | Count |
|---|---|
| 1915 | 5 |
| 1917 | 11 |
| 1920 | 8 |
| 1921 | 12 |
| 1923 | 12 |
| 1924 | 5 |
| 1925 | 5 |
| 1928 | 5 |
| 1929 | 6 |
| 1930 | 6 |
| 1935 | 5 |
| 1939 | 5 |
| 1941 | 5 |
| 1956 | 5 |
| 1963 | 5 |
| 1971 | 5 |
| 1975 | 5 |
| 1981 | 5 |
| 1982 | 5 |
| 1984 | 5 |
| 1987 | 5 |
| 1989 | 12 |
| 1990 | 16 |
| 1991 | 5 |
| 1992 | 7 |
| 1993 | 11 |
| 1994 | 13 |
| 1995 | 15 |
| 1996 | 19 |
| 1997 | 45 |
| 1998 | 37 |
| 1999 | 19 |
| 2000 | 27 |
| 2001 | 65 |
| 2002 | 25 |
| 2003 | 10 |
| 2004 | 6 |
| 2005 | 35 |
| 2006 | 53 |
| 2007 | 16 |
| 2008 | 61 |
| 2009 | 26 |
| 2010 | 38 |
| 2011 | 30 |
| 2012 | 38 |
| 2013 | 52 |
| 2014 | 14 |
| 2015 | 40 |
| 2016 | 38 |
| 2017 | 64 |
| 2018 | 20 |
| 2019 | 63 |
| 2020 | 36 |
| 2021 | 36 |
| 2022 | 76 |
| 2023 | 62 |
| 2024 | 30 |