Year | Value | 2022 | 46.384704625561 | 2021 | 46.319931651261 | 2020 | 46.235422118108 | 2019 | 46.150567033036 | 2018 | 46.066396987028 | 2017 | 45.982478558589 | 2016 | 45.89870867444 | 2015 | 45.815292012119 | 2014 | 45.743866727597 | 2013 | 45.681683260431 | 2012 | 45.623615869609 | 2011 | 45.585211947766 | 2010 | 45.561567048769 | 2009 | 45.541407115294 | 2008 | 45.530623899048 | 2007 | 45.528119030189 | 2006 | 45.532967952909 | 2005 | 45.54950681927 | 2004 | 45.565273788648 | 2003 | 45.570974161655 | 2002 | 45.585312001321 | 2001 | 45.613328648227 | 2000 | 45.640430840993 | 1999 | 45.670061751165 | 1998 | 45.703126745039 | 1997 | 45.737868860397 | 1996 | 45.784277787007 | 1995 | 45.854270819107 | 1994 | 45.948058166382 | 1993 | 46.039867535164 | 1992 | 46.101274445779 | 1991 | 46.131862914171 | 1990 | 46.142081980642 | 1989 | 46.136464556907 | 1988 | 46.108300780161 | 1987 | 46.057849920726 | 1986 | 45.999557115435 | 1985 | 45.941740888492 | 1984 | 45.89514990487 | 1983 | 45.861103687893 | 1982 | 45.832407210133 | 1981 | 45.814321278831 | 1980 | 45.802451519943 | 1979 | 45.793714317458 | 1978 | 45.791643509298 | 1977 | 45.790851992646 | 1976 | 45.795125256592 | 1975 | 45.802855574742 | 1974 | 45.803346075014 | 1973 | 45.791304305357 | 1972 | 45.765342005384 | 1971 | 45.724224227122 | 1970 | 45.658280130174 | 1969 | 45.56861203981 | 1968 | 45.456911311882 | 1967 | 45.31729964894 | 1966 | 45.159891645824 | 1965 | 44.997453891394 | 1964 | 44.828402994441 | 1963 | 44.647313405941 | 1962 | 44.455187822348 | 1961 | 44.266510774903 | 1960 | 44.093747664501 |
|