| Year | Total | vs prev |
|---|---|---|
| 2017 | 0 | −100.0% |
| 2016 | 10 | −96.5% |
| 2015 | 288 | −21.5% |
| 2014 | 367 | −22.9% |
| 2013 | 476 | −42.2% |
| 2012 | 823 | +175.3% |
| 2011 | 299 | — |
| 2004 | 0 | −100.0% |
| 2003 | 10 | −86.5% |
| 2002 | 74 | −51.6% |
| 2001 | 153 | −1.3% |
| 2000 | 155 | −38.7% |
| 1999 | 253 | +16.6% |
| 1998 | 217 | −24.9% |
| 1997 | 289 | +15.6% |
| 1996 | 250 | −8.1% |
| 1995 | 272 | — |