| Year | Count |
|---|---|
| 1923 | 10 |
| 1941 | 6 |
| 1942 | 27 |
| 1943 | 8 |
| 1945 | 6 |
| 1946 | 12 |
| 1947 | 18 |
| 1948 | 12 |
| 1949 | 7 |
| 1951 | 10 |
| 1952 | 8 |
| 1957 | 10 |
| 1958 | 10 |
| 1959 | 10 |
| 1971 | 7 |
| 1972 | 11 |
| 1989 | 5 |
| 1990 | 28 |
| 1991 | 11 |
| 1992 | 22 |
| 1993 | 7 |
| 1994 | 49 |
| 1995 | 76 |
| 1996 | 77 |
| 1997 | 42 |
| 1998 | 76 |
| 1999 | 15 |
| 2000 | 39 |
| 2001 | 36 |
| 2002 | 29 |
| 2003 | 21 |
| 2004 | 24 |
| 2005 | 16 |
| 2006 | 5 |
| 2007 | 18 |
| 2008 | 31 |
| 2009 | 10 |
| 2010 | 13 |
| 2011 | 6 |
| 2014 | 6 |
| 2016 | 6 |
| 2019 | 10 |
| 2020 | 5 |