| Year | Count |
|---|---|
| 1959 | 42 |
| 1960 | 15 |
| 1971 | 5 |
| 1972 | 10 |
| 1974 | 10 |
| 1975 | 27 |
| 1976 | 16 |
| 1976 | 96 |
| 1977 | 26 |
| 1977 | 77 |
| 1978 | 59 |
| 1979 | 43 |
| 1980 | 47 |
| 1981 | 21 |
| 1982 | 19 |
| 1983 | 46 |
| 1984 | 34 |
| 1985 | 61 |
| 1986 | 27 |
| 1987 | 67 |
| 1988 | 34 |
| 1989 | 51 |
| 1990 | 10 |
| 1990 | 36 |
| 1991 | 66 |
| 1992 | 5 |
| 1992 | 80 |
| 1993 | 36 |
| 1993 | 53 |
| 1994 | 5 |
| 1994 | 38 |
| 1995 | 38 |
| 1996 | 24 |
| 1997 | 10 |
| 1998 | 12 |
| 1999 | 16 |
| 2001 | 7 |
| 2004 | 5 |
| 2006 | 10 |
| 2007 | 15 |
| 2009 | 10 |
| 2015 | 6 |