Year | Value | 2022 | 42.985010944978 | 2021 | 42.672785996784 | 2020 | 42.449199696056 | 2019 | 42.591088333899 | 2018 | 42.413566399173 | 2017 | 42.098999133027 | 2016 | 41.862200916698 | 2015 | 41.622778409673 | 2014 | 41.430924507235 | 2013 | 40.356166264316 | 2012 | 39.134121106836 | 2011 | 37.984696229372 | 2010 | 36.71113604059 | 2009 | 35.391183478951 | 2008 | 34.283692523307 | 2007 | 33.031548307007 | 2006 | 31.802190802776 | 2005 | 30.383780538494 | 2004 | 28.995830298762 | 2003 | 28.545128786758 | 2002 | 28.077385725742 | 2001 | 27.631913271788 | 2000 | 27.23797907612 | 1999 | 26.982007922796 | 1998 | 26.957280326161 | 1997 | 26.951349480339 | 1996 | 26.949273057276 | 1995 | 27.021319292478 | 1994 | 27.002417719544 | 1993 | 27.127082275393 | 1992 | 27.05287982597 | 1991 | 27.006971226706 |
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