| Year | Value | | 2022 | 50.382575672529 | | 2021 | 49.735535687506 | | 2020 | 50.90863539241 | | 2019 | 53.553391051923 | | 2018 | 53.20403449534 | | 2017 | 55.336478905704 | | 2016 | 56.412345312916 | | 2015 | 57.118312799881 | | 2014 | 59.71210939959 | | 2013 | 60.279082608748 | | 2012 | 62.904686362144 | | 2011 | 63.78317600346 | | 2010 | 60.150335135871 | | 2009 | 48.692722855974 | | 2008 | 62.629078750657 | | 2007 | 54.211659091982 | | 2006 | 58.594085899112 | | 2005 | 55.189851923205 | | 2004 | 46.890397270426 | | 2003 | 47.134005622218 | | 2002 | 45.702173590353 | | 2001 | 42.507300644725 |
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