| 1990 | 1 |
| 1991 | 3 |
| 1992 | 2 |
| 1993 | 5 |
| 1994 | 7 |
| 1995 | 4 |
| 1996 | 7 |
| 1997 | 8 |
| 1998 | 6 |
| 1999 | 4 |
| 2000 | 9 |
| 2001 | 7 |
| 2002 | 10 |
| 2003 | 7 |
| 2004 | 22 |
| 2005 | 195 |
| 2006 | 196 |
| 2007 | 233 |
| 2008 | 223 |
| 2009 | 201 |
| 2010 | 325 |
| 2011 | 378 |
| 2012 | 305 |
| 2013 | 332 |
| 2014 | 428 |
| 2015 | 258 |
| 2016 | 203 |
| 2017 | 109 |
| 2018 | 112 |
| 2019 | 302 |
| 2020 | 225 |
| 2021 | 309 |
| 2022 | 215 |
| 2023 | 69 |