Year | Value | 2022 | 0.7208754559893 | 2021 | 0.042327057255214 | 2020 | 0.08169315864946 | 2019 | 0.22551987421288 | 2018 | 0.30052670199206 | 2017 | 0.37372455989584 | 2016 | 0.80721853857387 | 2015 | 0.86570264395025 | 2014 | 0.41687735916829 | 2013 | 0.27290021468154 | 2012 | 0.18772780056729 | 2011 | -1.8537146287573 | 2010 | 0.1531984469373 | 2009 | 0.2533834101634 | 2008 | 0.19014284469567 | 2007 | 0.13371857260049 | 2006 | 0.11279749764493 | 2005 | 0.056778261835203 | 2004 | 0.021709727650009 | 2003 | 0.055363303587324 | 2002 | 0.16812831940693 | 2001 | 0.16822536133734 | 2000 | 0.13543160039308 | 1999 | 0.064634577905237 | 1998 | 0.015143650855281 | 1997 | 0.1463132815618 | 1996 | 0.28947489945545 | 1995 | 0.2939044437167 | 1994 | 0.34685664863023 | 1993 | 0.65739121808763 | 1992 | 0.76034694672113 | 1991 | 0.72860554656136 | 1990 | 0.86196944876493 | 1989 | 0.77333699061076 | 1988 | 0.39067896024204 | 1987 | 0.15361757528619 | 1986 | 0.045768063973654 | 1985 | 0.22348990158236 | 1984 | 0.34566640229696 | 1983 | 0.26215257230517 | 1982 | 0.095113436547774 | 1981 | 0.15230848935972 | 1980 | 0.20743040618511 | 1979 | 0.044207406298957 | 1978 | 0.087031415353785 | 1977 | 0.22637666251872 | 1976 | 0.42876687496026 | 1975 | 0.3728463593609 | 1974 | 0.038969223198396 | 1973 | 0.31494245119858 | 1972 | 0.47848104565798 | 1971 | 0.18347531357486 | 1970 | 0.33266139281335 | 1969 | 0.79298373818153 | 1968 | 0.444717326247 | 1967 | 0.45720852669756 | 1966 | 0.83456080063499 | 1965 | 0.85319043680184 | 1964 | 0.80514088333369 | 1963 | 0.9258750634699 | 1962 | 0.87943169150815 | 1961 | 0.76985434428414 |
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