| Year | Count |
|---|---|
| 1978 | 14 |
| 1993 | 14 |
| 1995 | 20 |
| 1996 | 12 |
| 1998 | 12 |
| 1999 | 16 |
| 2000 | 14 |
| 2001 | 10 |
| 2002 | 12 |
| 2003 | 16 |
| 2004 | 24 |
| 2005 | 18 |
| 2006 | 12 |
| 2007 | 18 |
| 2008 | 14 |
| 2009 | 26 |
| 2010 | 28 |
| 2011 | 26 |
| 2012 | 41 |
| 2013 | 67 |
| 2014 | 62 |
| 2015 | 96 |
| 2016 | 60 |
| 2017 | 155 |
| 2018 | 212 |
| 2019 | 239 |
| 2020 | 424 |
| 2021 | 8 |
| 2021 | 594 |
| 2022 | 65 |
| 2022 | 945 |
| 2023 | 92 |
| 2023 | 1,124 |
| 2024 | 89 |
| 2024 | 1,192 |