| Year | Count |
|---|---|
| 1974 | 1,338 |
| 1974 | 700 |
| 1975 | 1,141 |
| 1975 | 555 |
| 1976 | 550 |
| 1976 | 91 |
| 1977 | 442 |
| 1977 | 27 |
| 1978 | 393 |
| 1978 | 6 |
| 1979 | 321 |
| 1980 | 303 |
| 1981 | 238 |
| 1982 | 252 |
| 1983 | 215 |
| 1984 | 293 |
| 1985 | 351 |
| 1986 | 214 |
| 1987 | 205 |
| 1988 | 112 |
| 1989 | 152 |
| 1990 | 143 |
| 1991 | 161 |
| 1991 | 5 |
| 1992 | 222 |
| 1993 | 238 |
| 1994 | 184 |
| 1995 | 153 |
| 1995 | 5 |
| 1996 | 175 |
| 1996 | 5 |
| 1997 | 205 |
| 1997 | 5 |
| 1998 | 204 |
| 1999 | 164 |
| 2000 | 82 |
| 2001 | 129 |
| 2002 | 70 |
| 2003 | 59 |
| 2003 | 10 |
| 2004 | 82 |
| 2005 | 59 |
| 2006 | 48 |
| 2006 | 5 |
| 2007 | 10 |
| 2008 | 27 |
| 2011 | 12 |
| 2016 | 5 |
| 2019 | 5 |