| Year | Count |
|---|---|
| 1979 | 5 |
| 1982 | 6 |
| 1984 | 5 |
| 1990 | 6 |
| 1991 | 5 |
| 1993 | 10 |
| 1994 | 22 |
| 1995 | 6 |
| 1996 | 5 |
| 1997 | 19 |
| 1998 | 42 |
| 1999 | 56 |
| 2000 | 64 |
| 2001 | 112 |
| 2002 | 57 |
| 2003 | 107 |
| 2004 | 128 |
| 2005 | 138 |
| 2006 | 160 |
| 2007 | 5 |
| 2007 | 232 |
| 2008 | 378 |
| 2009 | 431 |
| 2010 | 6 |
| 2010 | 529 |
| 2011 | 506 |
| 2012 | 5 |
| 2012 | 610 |
| 2013 | 627 |
| 2014 | 10 |
| 2014 | 614 |
| 2015 | 618 |
| 2016 | 778 |
| 2017 | 717 |
| 2018 | 660 |
| 2019 | 766 |
| 2020 | 650 |
| 2021 | 896 |
| 2022 | 6 |
| 2022 | 791 |
| 2023 | 21 |
| 2023 | 968 |
| 2024 | 10 |
| 2024 | 1,004 |