| Year | Count |
|---|---|
| 1940 | 5 |
| 1943 | 5 |
| 1947 | 5 |
| 1954 | 5 |
| 1958 | 12 |
| 1959 | 10 |
| 1968 | 6 |
| 1969 | 5 |
| 1970 | 5 |
| 1973 | 5 |
| 1976 | 5 |
| 1982 | 6 |
| 1985 | 5 |
| 1986 | 31 |
| 1987 | 51 |
| 1988 | 56 |
| 1988 | 7 |
| 1989 | 86 |
| 1990 | 48 |
| 1990 | 6 |
| 1991 | 78 |
| 1991 | 7 |
| 1992 | 103 |
| 1993 | 104 |
| 1994 | 58 |
| 1995 | 57 |
| 1995 | 18 |
| 1996 | 25 |
| 1997 | 52 |
| 1998 | 42 |
| 1999 | 20 |
| 1999 | 10 |
| 2000 | 5 |
| 2000 | 10 |
| 2001 | 5 |
| 2001 | 5 |
| 2002 | 5 |
| 2003 | 38 |
| 2004 | 32 |
| 2007 | 13 |
| 2008 | 10 |
| 2009 | 10 |
| 2010 | 6 |
| 2011 | 7 |
| 2016 | 5 |