| Year | Count |
|---|---|
| 1987 | 12 |
| 2000 | 5 |
| 2003 | 12 |
| 2004 | 22 |
| 2005 | 54 |
| 2006 | 131 |
| 2007 | 937 |
| 2008 | 1,778 |
| 2009 | 1,926 |
| 2010 | 1,888 |
| 2011 | 1,765 |
| 2012 | 2,194 |
| 2013 | 2,644 |
| 2014 | 3,098 |
| 2015 | 4,132 |
| 2016 | 4,416 |
| 2017 | 4,114 |
| 2018 | 4,636 |
| 2019 | 4,337 |
| 2020 | 3,830 |
| 2021 | 4,353 |
| 2022 | 3,602 |
| 2023 | 2,961 |
| 2024 | 2,405 |