| Date | Value | Change, % |
|---|---|---|
| 2017 | 1,637.2 | -25.69% |
| 2016 | 2,203.2 | 11.10% |
| 2015 | 1,983.0 | 22.92% |
| 2014 | 1,613.3 | 14.80% |
| 2013 | 1,405.3 | -34.81% |
| 2012 | 2,155.8 | 111.57% |
| 2011 | 1,018.9 | -54.82% |
| 2010 | 2,255.2 | 97.02% |
| 2009 | 1,144.7 | -14.30% |
| 2008 | 1,335.7 | 22.10% |
| 2007 | 1,093.9 | -32.07% |
| 2006 | 1,610.4 |