| Year | Total | vs prev |
|---|---|---|
| 2023 | 0 | −100.0% |
| 2022 | 15 | −94.2% |
| 2021 | 260 | +138.5% |
| 2020 | 109 | −38.8% |
| 2019 | 178 | −45.4% |
| 2018 | 326 | −10.2% |
| 2017 | 363 | +2.0% |
| 2016 | 356 | −18.0% |
| 2015 | 434 | +12.7% |
| 2014 | 385 | +11.3% |
| 2013 | 346 | −20.6% |
| 2012 | 436 | −28.4% |
| 2011 | 609 | −18.3% |
| 2010 | 745 | +9.4% |
| 2009 | 681 | — |