Year | Value | 2021 | 28.236 | 2020 | 28.8 | 2019 | 29.466 | 2018 | 30.126 | 2017 | 30.973 | 2016 | 31.921 | 2015 | 32.726 | 2014 | 32.477 | 2013 | 32.521 | 2012 | 32.894 | 2011 | 33.382 | 2010 | 33.727 | 2009 | 33.406 | 2008 | 33.45 | 2007 | 35.855 | 2006 | 36.7 | 2005 | 37.3 | 2004 | 38.1 | 2003 | 38.8 | 2002 | 39.6 | 2001 | 40.2 | 2000 | 40.9 | 1999 | 41.4 | 1998 | 42.1 | 1997 | 42.7 | 1996 | 43.06 | 1995 | 43.42 | 1994 | 43.78 | 1993 | 44.14 | 1992 | 44.5 | 1991 | 44.86 | 1990 | 45.22 |
|