| Year | Count |
|---|---|
| 1950 | 26 |
| 1972 | 10 |
| 1972 | 7 |
| 1973 | 67 |
| 1974 | 21 |
| 1975 | 26 |
| 1976 | 15 |
| 1977 | 10 |
| 1978 | 23 |
| 1979 | 10 |
| 1980 | 18 |
| 1981 | 5 |
| 1982 | 29 |
| 1983 | 18 |
| 1984 | 42 |
| 1985 | 54 |
| 1986 | 18 |
| 1987 | 58 |
| 1988 | 61 |
| 1989 | 62 |
| 1990 | 42 |
| 1991 | 63 |
| 1992 | 41 |
| 1993 | 24 |
| 1994 | 22 |
| 1995 | 6 |
| 1997 | 5 |
| 1998 | 5 |
| 1999 | 5 |
| 2001 | 5 |
| 2006 | 5 |
| 2007 | 10 |
| 2008 | 5 |
| 2010 | 5 |
| 2016 | 12 |
| 2017 | 5 |
| 2018 | 5 |
| 2021 | 10 |
| 2023 | 10 |