Year | Value | 2022 | 27.394930356067 | 2021 | 29.517944092487 | 2020 | 28.018895239285 | 2019 | 29.27591550172 | 2018 | 28.900478296064 | 2017 | 28.742686435699 | 2016 | 26.432035124023 | 2015 | 26.85657626489 | 2014 | 27.839589347089 | 2013 | 27.526707277398 | 2012 | 27.451715466122 | 2011 | 26.884385788823 | 2010 | 23.360884350206 | 2009 | 23.755580995832 | 2008 | 23.441824391479 | 2007 | 24.354782955072 | 2006 | 24.608948629869 | 2005 | 24.273819899605 | 2004 | 22.268952696595 | 2003 | 21.955068788734 | 2002 | 21.984795325108 | 2001 | 23.057505420611 | 2000 | 23.770956406774 |
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