Year | Value | 2021 | 38.504155124654 | 2020 | 38.504155124654 | 2019 | 38.504155124654 | 2018 | 38.504155124654 | 2017 | 38.504155124654 | 2016 | 38.504155124654 | 2015 | 38.504155124654 | 2014 | 38.587257617728 | 2013 | 38.670360110803 | 2012 | 38.76269621422 | 2011 | 38.827331486611 | 2010 | 38.901200369344 | 2009 | 41.18190212373 | 2008 | 41.45891043398 | 2007 | 42.843951985226 | 2006 | 43.120960295475 | 2005 | 43.120960295475 | 2004 | 43.582640812558 | 2003 | 43.767313019391 | 2002 | 43.767313019391 | 2001 | 44.228993536473 | 2000 | 44.228993536473 | 1999 | 44.506001846722 | 1998 | 44.690674053555 | 1997 | 45.152354570637 | 1996 | 45.614035087719 | 1995 | 45.891043397969 | 1994 | 46.168051708218 | 1993 | 46.445060018467 | 1992 | 43.951985226223 | 1991 | 43.951985226223 | 1990 | 43.951985226223 | 1989 | 44.04432132964 | 1988 | 44.04432132964 | 1987 | 44.04432132964 | 1986 | 44.04432132964 | 1985 | 44.04432132964 | 1984 | 44.04432132964 | 1983 | 44.04432132964 | 1982 | 44.967682363804 | 1981 | 45.891043397969 | 1980 | 45.891043397969 | 1979 | 45.891043397969 | 1978 | 46.814404432133 | 1977 | 46.814404432133 | 1976 | 46.814404432133 | 1975 | 46.814404432133 | 1974 | 46.814404432133 | 1973 | 46.814404432133 | 1972 | 46.814404432133 | 1971 | 46.814404432133 | 1970 | 46.814404432133 | 1969 | 47.737765466297 | 1968 | 47.737765466297 | 1967 | 47.737765466297 | 1966 | 47.737765466297 | 1965 | 46.814404432133 | 1964 | 49.21514312096 | 1963 | 49.399815327793 | 1962 | 49.399815327793 | 1961 | 49.21514312096 |
|