Year | Value | 2022 | 57.974748212878 | 2021 | 69.907717024407 | 2020 | 69.21905594987 | 2019 | 60.141986685415 | 2018 | 54.429696919754 | 2017 | 53.264221787473 | 2016 | 54.644302131005 | 2015 | 46.465788532639 | 2014 | 41.712889019469 | 2013 | 37.555749961787 | 2012 | 39.43866550466 | 2011 | 30.093447930464 | 2010 | 28.66210102723 | 2009 | 23.868654974747 | 2008 | 18.180546595582 | 2007 | 20.095718823202 | 2006 | 21.439297308383 | 2005 | 22.406050298128 | 2004 | 22.861071023934 | 2003 | 25.073713622576 | 2002 | 25.883539604942 | 2001 | 27.693305927888 | 2000 | 29.522812121797 | 1999 | 31.066070340154 | 1998 | 16.877503224493 | 1997 | 20.859942694439 | 1996 | 21.811108023344 | 1995 | 21.680320099386 | 1994 | 20.188765374155 | 1993 | 17.874211259711 | 1992 | 14.145547415249 | 1991 | 11.91897351687 | 1990 | 12.227727053707 |
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