| Year | Count |
|---|---|
| 1978 | 7 |
| 1979 | 5 |
| 1980 | 6 |
| 1997 | 7 |
| 1998 | 36 |
| 1999 | 10 |
| 2000 | 12 |
| 2001 | 5 |
| 2002 | 5 |
| 2003 | 21 |
| 2004 | 46 |
| 2005 | 46 |
| 2006 | 59 |
| 2007 | 33 |
| 2008 | 93 |
| 2009 | 21 |
| 2010 | 11 |
| 2011 | 60 |
| 2012 | 45 |
| 2013 | 20 |
| 2014 | 20 |
| 2015 | 64 |
| 2016 | 83 |
| 2017 | 127 |
| 2018 | 116 |
| 2019 | 211 |
| 2020 | 113 |
| 2021 | 113 |
| 2022 | 128 |
| 2023 | 116 |
| 2024 | 133 |