| Year | Total | vs prev |
|---|---|---|
| 2023 | 280 | +259.0% |
| 2022 | 78 | +358.8% |
| 2021 | 17 | −92.2% |
| 2020 | 218 | −41.7% |
| 2019 | 374 | −5.3% |
| 2018 | 395 | −61.7% |
| 2017 | 1,031 | −16.7% |
| 2016 | 1,237 | −17.0% |
| 2015 | 1,491 | +54.2% |
| 2014 | 967 | +60.6% |
| 2013 | 602 | −38.4% |
| 2012 | 978 | −43.7% |
| 2011 | 1,737 | −38.6% |
| 2010 | 2,827 | −15.5% |
| 2009 | 3,346 | +8.9% |
| 2008 | 3,072 | +23530.8% |
| 2007 | 13 | — |