| Year | Count |
|---|---|
| 1942 | 10 |
| 1946 | 10 |
| 1947 | 15 |
| 1951 | 5 |
| 1952 | 5 |
| 1956 | 15 |
| 1959 | 5 |
| 1964 | 10 |
| 1965 | 10 |
| 1966 | 12 |
| 1969 | 6 |
| 1970 | 13 |
| 1971 | 10 |
| 1972 | 8 |
| 1973 | 9 |
| 1974 | 23 |
| 1975 | 10 |
| 1976 | 15 |
| 1977 | 11 |
| 1978 | 19 |
| 1979 | 13 |
| 1980 | 23 |
| 1981 | 28 |
| 1982 | 23 |
| 1983 | 48 |
| 1984 | 22 |
| 1985 | 77 |
| 1986 | 56 |
| 1987 | 42 |
| 1988 | 88 |
| 1989 | 23 |
| 1990 | 54 |
| 1991 | 32 |
| 1992 | 66 |
| 1993 | 13 |
| 1994 | 36 |
| 1995 | 13 |
| 1996 | 19 |
| 1997 | 13 |
| 1998 | 47 |
| 1999 | 10 |
| 2001 | 25 |
| 2002 | 12 |
| 2004 | 20 |
| 2005 | 46 |
| 2006 | 15 |
| 2007 | 17 |
| 2008 | 8 |
| 2009 | 11 |
| 2010 | 10 |
| 2018 | 6 |