Annual data series are interpolated from 5-year period data. Therefore they may not reflect real events as much as observed data.
| Date | Value | Change, % |
|---|---|---|
| 2013 | 51.0 | 0.04% |
| 2012 | 51.0 | 0.03% |
| 2011 | 51.0 | 0.03% |
| 2010 | 51.0 | 0.02% |
| 2009 | 51.0 | 0.02% |
| 2008 | 51.0 | 0.01% |
| 2007 | 50.9 | 0.00% |
| 2006 | 50.9 | -0.01% |
| 2005 | 50.9 | -0.02% |
| 2004 | 51.0 | -0.04% |
| 2003 | 51.0 | -0.03% |
| 2002 | 51.0 |
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