| Year | Count |
|---|---|
| 1976 | 42 |
| 1977 | 27 |
| 1978 | 50 |
| 1979 | 48 |
| 1980 | 89 |
| 1981 | 103 |
| 1982 | 109 |
| 1983 | 96 |
| 1984 | 118 |
| 1985 | 131 |
| 1986 | 86 |
| 1987 | 124 |
| 1988 | 121 |
| 1989 | 136 |
| 1990 | 136 |
| 1991 | 194 |
| 1992 | 239 |
| 1993 | 248 |
| 1994 | 293 |
| 1995 | 210 |
| 1996 | 244 |
| 1997 | 226 |
| 1998 | 328 |
| 1999 | 305 |
| 2000 | 352 |
| 2001 | 376 |
| 2002 | 366 |
| 2003 | 334 |
| 2004 | 343 |
| 2005 | 290 |
| 2006 | 311 |
| 2007 | 239 |
| 2008 | 349 |
| 2009 | 240 |
| 2010 | 227 |
| 2011 | 217 |
| 2012 | 219 |
| 2013 | 195 |
| 2014 | 158 |
| 2015 | 102 |
| 2016 | 159 |
| 2017 | 178 |
| 2018 | 96 |
| 2019 | 96 |
| 2020 | 99 |
| 2021 | 197 |
| 2022 | 148 |
| 2023 | 131 |
| 2024 | 159 |