Year | Value | 2022 | 43.379505427538 | 2021 | 47.318915397226 | 2020 | 49.190317826543 | 2019 | 45.491770366877 | 2018 | 43.683538334599 | 2017 | 46.952777396299 | 2016 | 47.372718440437 | 2015 | 44.847280346496 | 2014 | 37.020624457615 | 2013 | 35.425593003224 | 2012 | 32.198560658799 | 2011 | 31.502381667596 | 2010 | 36.864633493847 | 2009 | 47.648177922402 | 2008 | 34.82907554209 | 2007 | 42.784624969526 | 2006 | 37.87103995435 | 2005 | 40.869762721437 | 2004 | 48.615540919485 | 2003 | 51.387119871485 | 2002 | 52.770869216899 | 2001 | 55.744601600283 | 2000 | 50.644924854593 | 1999 | 63.114018212133 | 1998 | 70.132743362832 | 1997 | 64.455099131787 | 1996 | 63.884652710384 | 1995 | 63.397913561848 | 1994 | 65.849751721929 | 1993 | 64.380464274947 | 1992 | 54.247982391783 | 1991 | 49.397967161845 | 1990 | 48.50336937784 | 1989 | 50.939808553567 | 1983 | 20.802816381295 | 1982 | 15.538874582215 | 1981 | 13.713480405442 | 1980 | 15.274408732565 | 1979 | 14.465893621558 | 1978 | 15.152201485776 | 1977 | 17.412699914829 | 1976 | 19.481812235147 | 1975 | 28.299162575801 | 1974 | 24.539408302118 |
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