Year | Value | 2021 | 19.48687 | 2020 | 26.83 | 2019 | 32.227 | 2018 | 33.201 | 2017 | 23.184 | 2016 | 23.184 | 2015 | 22.345086760926 | 2014 | 28.947996 | 2013 | 30.471996 | 2012 | 24.846814043848 | 2011 | 23.232548447492 | 2010 | 24.107 | 2009 | 35.195 | 2008 | 27.811 | 2007 | 26.793 | 2006 | 26.268 | 2005 | 27.08 | 2004 | 28.208 | 2003 | 24.317 | 2002 | 24.274 | 2001 | 27.584 | 2000 | 29.983 | 1999 | 31.7999992371 | 1998 | 26.8999996185 | 1997 | 29.5 | 1996 | 25.7999992371 | 1995 | 24.3999996185 | 1994 | 26.6000003815 | 1993 | 2.7000000477 | 1992 | 17.2999992371 | 1991 | 16.6000003815 | 1990 | 14.5 | 1989 | 14.5 | 1988 | 22.8999996185 | 1987 | 12 | 1986 | 10.3999996185 | 1985 | 11.5 | 1984 | 12.1000003815 | 1983 | 3.7999999523 | 1982 | 3.7000000477 | 1981 | 3.5999999046 | 1980 | 3.5999999046 | 1979 | 3 | 1978 | 3.0999999046 | 1977 | 1.1000000238 | 1976 | 1 |
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