| Year | Count |
|---|---|
| 1988 | 5 |
| 1992 | 5 |
| 1999 | 5 |
| 2000 | 9 |
| 2001 | 11 |
| 2002 | 8 |
| 2003 | 52 |
| 2004 | 43 |
| 2005 | 36 |
| 2006 | 41 |
| 2007 | 45 |
| 2008 | 83 |
| 2009 | 108 |
| 2010 | 110 |
| 2011 | 153 |
| 2012 | 256 |
| 2013 | 590 |
| 2014 | 802 |
| 2015 | 1,209 |
| 2016 | 1,731 |
| 2017 | 2,176 |
| 2018 | 2,543 |
| 2019 | 2,563 |
| 2020 | 2,194 |
| 2021 | 3,059 |
| 2022 | 3,830 |
| 2023 | 4,876 |
| 2024 | 5,706 |