Year | Value | 2021 | 36.814791048368 | 2020 | 36.810780460416 | 2019 | 36.798748696559 | 2018 | 36.730568701372 | 2017 | 36.714526349563 | 2016 | 36.756236464266 | 2015 | 36.7281623486 | 2014 | 36.6359188257 | 2013 | 36.486724953878 | 2012 | 36.338333199647 | 2011 | 36.348760728323 | 2010 | 35.974973931178 | 2009 | 35.798508061282 | 2008 | 35.449586909441 | 2007 | 35.489692788963 | 2006 | 35.403064089196 | 2005 | 35.439961498356 | 2004 | 35.541830432341 | 2003 | 35.693430656934 | 2002 | 35.644501483918 | 2001 | 35.626052779337 | 2000 | 35.712681479105 | 1999 | 35.747974653084 | 1998 | 35.7046603032 | 1997 | 35.654126895003 | 1996 | 35.651720542232 | 1995 | 35.68621159862 | 1994 | 35.702253950429 | 1993 | 35.702253950429 | 1992 | 35.70305606802 | 1991 | 35.680596775487 | 1990 | 35.658939600545 | 1989 | 35.676586187535 | 1988 | 35.695034892115 | 1987 | 35.712681479105 | 1986 | 35.730328066095 | 1985 | 35.796903826101 | 1984 | 35.814550413091 | 1983 | 35.837009705623 | 1982 | 35.858666880565 | 1981 | 35.877115585145 | 1980 | 35.906793935991 | 1979 | 35.929253228523 | 1978 | 35.954920991417 | 1977 | 35.973369695997 | 1976 | 35.991016282987 | 1975 | 36.169888505655 | 1974 | 36.187535092645 | 1973 | 36.205181679634 | 1972 | 36.223630384214 | 1971 | 36.241276971204 | 1970 | 36.259725675784 | 1969 | 36.277372262774 | 1968 | 36.263736263736 | 1967 | 36.257319323013 | 1966 | 36.25170449988 | 1965 | 36.245287559156 | 1964 | 36.247693911927 | 1963 | 36.241276971204 | 1962 | 36.243683323975 | 1961 | 36.237266383252 |
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