| Year | Count |
|---|---|
| 1989 | 5 |
| 1990 | 10 |
| 1992 | 12 |
| 1993 | 39 |
| 1994 | 93 |
| 1995 | 99 |
| 1996 | 100 |
| 1997 | 101 |
| 1998 | 154 |
| 1999 | 140 |
| 2000 | 185 |
| 2001 | 240 |
| 2002 | 191 |
| 2003 | 254 |
| 2004 | 319 |
| 2004 | 18 |
| 2005 | 172 |
| 2005 | 33 |
| 2006 | 146 |
| 2006 | 18 |
| 2007 | 171 |
| 2007 | 20 |
| 2008 | 263 |
| 2008 | 26 |
| 2009 | 224 |
| 2009 | 35 |
| 2010 | 248 |
| 2010 | 20 |
| 2011 | 286 |
| 2011 | 24 |
| 2012 | 270 |
| 2012 | 20 |
| 2013 | 185 |
| 2013 | 26 |
| 2014 | 245 |
| 2014 | 54 |
| 2015 | 197 |
| 2015 | 45 |
| 2016 | 146 |
| 2016 | 39 |
| 2017 | 101 |
| 2017 | 12 |
| 2018 | 156 |
| 2018 | 51 |
| 2019 | 111 |
| 2019 | 41 |
| 2020 | 86 |
| 2020 | 76 |
| 2021 | 110 |
| 2021 | 59 |
| 2022 | 33 |
| 2022 | 79 |
| 2023 | 52 |
| 2023 | 77 |
| 2024 | 21 |
| 2024 | 58 |