| Year | Total | vs prev |
|---|---|---|
| 2019 | 1,352 | +24.7% |
| 2018 | 1,084 | −2.4% |
| 2017 | 1,111 | −17.2% |
| 2016 | 1,341 | +6.2% |
| 2015 | 1,263 | +12.3% |
| 2014 | 1,125 | +0.4% |
| 2013 | 1,120 | +30.7% |
| 2012 | 857 | +6.7% |
| 2011 | 803 | +34.3% |
| 2010 | 598 | +6.4% |
| 2009 | 562 | +5.2% |
| 2008 | 534 | +7.9% |
| 2007 | 495 | +49.1% |
| 2006 | 332 | −19.8% |
| 2005 | 414 | −26.3% |
| 2004 | 562 | +27.1% |
| 2003 | 442 | — |