| Year | Count |
|---|---|
| 1987 | 5 |
| 1988 | 5 |
| 1991 | 10 |
| 1993 | 10 |
| 1993 | 5 |
| 1995 | 6 |
| 2002 | 6 |
| 2005 | 8 |
| 2006 | 5 |
| 2006 | 5 |
| 2007 | 27 |
| 2008 | 23 |
| 2009 | 13 |
| 2010 | 83 |
| 2011 | 207 |
| 2012 | 241 |
| 2013 | 293 |
| 2014 | 393 |
| 2015 | 432 |
| 2016 | 15 |
| 2016 | 410 |
| 2017 | 391 |
| 2018 | 10 |
| 2018 | 498 |
| 2019 | 588 |
| 2020 | 683 |
| 2021 | 8 |
| 2021 | 1,032 |
| 2022 | 1,027 |
| 2023 | 11 |
| 2023 | 1,048 |
| 2024 | 7 |
| 2024 | 1,570 |