| Year | Average | value | 10th percentile | 90th percentile | Target value |
|---|---|---|---|---|---|
| 2000 | 105 | 82 | 129 | 120 | |
| 2001 | 115 | 86 | 139 | 120 | |
| 2002 | 109 | 86 | 133 | 120 | |
| 2003 | 130 | 97 | 156 | 120 | |
| 2004 | 111 | 89 | 131 | 120 | |
| 2005 | 112 | 89 | 133 | 120 | |
| 2006 | 121 | 97 | 141 | 120 | |
| 2007 | 111 | 90 | 132 | 120 | |
| 2008 | 110 | 92 | 128 | 120 | |
| 2009 | 109 | 90 | 130 | 120 | |
| 2010 | 110 | 86 | 130 | 120 | |
| 2011 | 110 | 90 | 128 | 120 | |
| 2012 | 107 | 88 | 127 | 120 | |
| 2013 | 110 | 91 | 129 | 120 | |
| 2014 | 105 | 86 | 120 | 120 | |
| 2015 | 112 | 87 | 135 | 120 | |
| 2016 | 107 | 87 | 124 | 120 | |