| 1984 | 1 |
| 1985 | 1 |
| 1986 | 2 |
| 1987 | 3 |
| 1988 | 6 |
| 1989 | 8 |
| 1990 | 13 |
| 1991 | 21 |
| 1992 | 14 |
| 1993 | 23 |
| 1994 | 20 |
| 1995 | 25 |
| 1996 | 35 |
| 1997 | 30 |
| 1998 | 46 |
| 1999 | 30 |
| 2000 | 46 |
| 2001 | 47 |
| 2002 | 43 |
| 2003 | 31 |
| 2004 | 64 |
| 2005 | 218 |
| 2006 | 213 |
| 2007 | 248 |
| 2008 | 233 |
| 2009 | 219 |
| 2010 | 340 |
| 2011 | 391 |
| 2012 | 329 |
| 2013 | 350 |
| 2014 | 444 |
| 2015 | 283 |
| 2016 | 215 |
| 2017 | 153 |
| 2018 | 175 |
| 2019 | 321 |
| 2020 | 280 |
| 2021 | 348 |
| 2022 | 257 |
| 2023 | 140 |
| 2024 | 103 |
| 2025 | 46 |
| 2026 | 6 |