Year | Value | 2022 | 62.800962809902 | 2021 | 61.68921414281 | 2020 | 62.203002374485 | 2019 | 62.651581269861 | 2018 | 62.617427035729 | 2017 | 63.052549751565 | 2016 | 63.453477843484 | 2015 | 63.821671541192 | 2014 | 64.193861194501 | 2013 | 63.826086451132 | 2012 | 63.650189948417 | 2011 | 62.557374901472 | 2010 | 62.220770990278 | 2009 | 62.018037487493 | 2008 | 62.27437222411 | 2007 | 62.093396762682 | 2006 | 60.967970945913 | 2005 | 60.316406252947 | 2004 | 59.767580395898 | 2003 | 59.157839169147 | 2002 | 59.05721042597 | 2001 | 59.282851347058 | 2000 | 59.494019349048 | 1999 | 59.008845145226 | 1998 | 59.209312979701 | 1997 | 58.88094878511 | 1996 | 59.053536305881 | 1995 | 58.410526834316 | 1994 | 58.04401451313 | 1993 | 57.836571094071 | 1992 | 58.026778285831 | 1991 | 58.180834298893 |
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