Year | Value | 2021 | 2.6582278481013 | 2020 | 2.6751592356688 | 2019 | 2.6923076923077 | 2018 | 2.6992287917738 | 2017 | 2.6794871794872 | 2016 | 2.6829268292683 | 2015 | 2.6735218508997 | 2014 | 2.6977950713359 | 2013 | 2.6883116883117 | 2012 | 2.6883116883117 | 2011 | 2.6857887874837 | 2010 | 2.7034120734908 | 2009 | 2.6973684210526 | 2008 | 2.6973684210526 | 2007 | 2.72 | 2006 | 2.7567567567568 | 2005 | 2.7432432432432 | 2004 | 2.7808219178082 | 2003 | 2.8055555555556 | 2002 | 2.8450704225352 | 2001 | 2.830985915493 | 2000 | 2.830985915493 | 1999 | 2.8169014084507 | 1998 | 2.8169014084507 | 1997 | 2.8169014084507 | 1996 | 2.8169014084507 | 1995 | 2.8169014084507 | 1994 | 2.8169014084507 | 1993 | 2.8169014084507 | 1992 | 2.8169014084507 | 1991 | 2.8985507246377 | 1990 | 2.8985507246377 | 1989 | 2.8985507246377 | 1988 | 2.8985507246377 | 1987 | 2.8985507246377 | 1986 | 2.8985507246377 | 1985 | 2.8985507246377 | 1984 | 2.8985507246377 | 1983 | 2.8985507246377 | 1982 | 2.8985507246377 | 1981 | 2.8985507246377 | 1980 | 2.8985507246377 | 1979 | 2.8985507246377 | 1978 | 2.8985507246377 | 1977 | 2.8985507246377 | 1976 | 2.8985507246377 | 1975 | 2.8985507246377 | 1974 | 2.8985507246377 | 1973 | 2.8985507246377 | 1972 | 2.8985507246377 | 1971 | 2.8985507246377 | 1970 | 2.8985507246377 | 1969 | 2.8985507246377 | 1968 | 2.8985507246377 | 1967 | 2.8985507246377 | 1966 | 2.8985507246377 | 1965 | 2.8985507246377 | 1964 | 2.8985507246377 | 1963 | 2.8985507246377 | 1962 | 2.8985507246377 | 1961 | 2.8985507246377 |
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