Year | Value | 2021 | 38.729971204269 | 2020 | 38.675210995879 | 2019 | 38.618175023661 | 2018 | 38.560419862443 | 2017 | 38.503769611604 | 2016 | 38.425885205731 | 2015 | 38.371775631634 | 2014 | 38.281500018692 | 2013 | 38.199409516594 | 2012 | 38.137422082846 | 2011 | 38.059867739512 | 2010 | 37.975577434386 | 2009 | 37.847470295991 | 2008 | 37.699635008829 | 2007 | 37.545382324856 | 2006 | 37.399550506018 | 2005 | 37.24411790945 | 2004 | 37.095541201491 | 2003 | 36.94367095961 | 2002 | 36.802966663868 | 2001 | 36.662901459102 | 2000 | 36.509018546262 | 1999 | 36.46237598536 | 1998 | 36.23106355086 | 1997 | 35.999894156813 | 1996 | 35.768594835762 | 1995 | 35.537705468927 | 1994 | 35.306817847629 | 1993 | 35.075932009648 | 1992 | 34.757953502017 | 1991 | 33.666803971508 | 1990 | 33.422625464426 |
|