Year | Value | 2022 | 0.52003129157843 | 2021 | 0.60040686105644 | 2020 | 0.75577106834934 | 2019 | 0.86512834665995 | 2018 | 0.93461530086448 | 2017 | 0.97871331599554 | 2016 | 1.0154707268883 | 2015 | 1.0463434043354 | 2014 | 1.0949459542438 | 2013 | 1.1532718484809 | 2012 | 1.2035803053359 | 2011 | 1.2400265620794 | 2010 | 1.2873898093698 | 2009 | 1.3503939550217 | 2008 | 1.3845538859768 | 2007 | 1.4027370039493 | 2006 | 1.4328420271297 | 2005 | 1.4725275866678 | 2004 | 1.5208652884811 | 2003 | 1.5879325381052 | 2002 | 1.6977490883507 | 2001 | 1.8433085469532 | 2000 | 1.9735882321416 | 1999 | 2.0720809620144 | 1998 | 2.1691556368856 | 1997 | 2.2497130687394 | 1996 | 2.3068379957966 | 1995 | 2.3706549214879 | 1994 | 2.4304542011903 | 1993 | 2.4805536145088 | 1992 | 2.5156199341436 | 1991 | 2.537342262811 | 1990 | 2.5413832897612 | 1989 | 2.5506023600987 | 1988 | 2.5943160563421 | 1987 | 2.6592037077459 | 1986 | 2.7188632863995 | 1985 | 2.7531965342394 | 1984 | 2.7703110963721 | 1983 | 2.7741068560299 | 1982 | 2.7602875966192 | 1981 | 2.7385686173218 | 1980 | 2.7311098994028 | 1979 | 2.7204108946885 | 1978 | 2.6855403063148 | 1977 | 2.6445292256157 | 1976 | 2.6030388756671 | 1975 | 2.5715521169109 | 1974 | 2.5583006857431 | 1973 | 2.5595862869652 | 1972 | 2.5932855546507 | 1971 | 2.6476727425581 | 1970 | 2.7163630603806 | 1969 | 2.7868623352735 | 1968 | 2.9040322039347 | 1967 | 3.0617019884407 | 1966 | 3.1858601985595 | 1965 | 3.3030877220925 | 1964 | 3.4118590578038 | 1963 | 3.5044683593811 | 1962 | 3.580816414491 | 1961 | 3.6348278767708 |
|