Year | Value | 2022 | 25.41770248254 | 2021 | 25.032410179501 | 2020 | 24.745097786581 | 2019 | 24.903651162313 | 2018 | 25.056281412568 | 2017 | 24.955659849653 | 2016 | 25.058154555482 | 2015 | 25.252601638806 | 2014 | 25.28544491799 | 2013 | 25.160934232237 | 2012 | 24.97084369025 | 2011 | 24.824099749118 | 2010 | 24.518742510576 | 2009 | 24.742877173656 | 2008 | 24.65629100452 | 2007 | 24.358540856362 | 2006 | 24.370029609811 | 2005 | 24.031612732313 | 2004 | 23.906490404148 | 2003 | 23.734873376875 | 2002 | 23.311092803911 | 2001 | 23.30355399252 | 2000 | 23.190619377289 | 1999 | 23.384845819667 | 1998 | 23.411752904005 | 1997 | 23.324536240751 | 1996 | 23.67871795051 | 1995 | 23.649834480191 | 1994 | 23.29353824304 | 1993 | 23.412125467694 | 1992 | 23.370373116674 | 1991 | 23.587538535782 |
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