| Date | Value | Change, % |
|---|---|---|
| 2017 | 1,054.2 | -49.97% |
| 2016 | 2,107.1 | 59.06% |
| 2015 | 1,324.7 | 8.72% |
| 2014 | 1,218.4 | 5.89% |
| 2013 | 1,150.7 | -23.80% |
| 2012 | 1,510.1 | 95.22% |
| 2011 | 773.5 | -53.16% |
| 2010 | 1,651.5 | 106.54% |
| 2009 | 799.6 | -22.80% |
| 2008 | 1,035.7 | -3.36% |
| 2007 | 1,071.7 | -33.94% |
| 2006 | 1,622.3 |