Year | Value | 2021 | 1.5906382978723 | 2020 | 1.6359574468085 | 2019 | 1.6831914893617 | 2018 | 1.7542553191489 | 2017 | 1.7446808510638 | 2016 | 1.7446808510638 | 2015 | 1.7234042553191 | 2014 | 1.7021276595745 | 2013 | 1.7234042553191 | 2012 | 1.6170212765957 | 2011 | 1.6382978723404 | 2010 | 1.6382978723404 | 2009 | 1.6382978723404 | 2008 | 1.6170212765957 | 2007 | 1.6382978723404 | 2006 | 1.6595744680851 | 2005 | 1.7021276595745 | 2004 | 1.7234042553191 | 2003 | 1.8297872340426 | 2002 | 1.8085106382979 | 2001 | 1.5957446808511 | 2000 | 2.1276595744681 | 1999 | 2.1276595744681 | 1998 | 2.1276595744681 | 1997 | 2.1276595744681 | 1996 | 2.1276595744681 | 1995 | 2.1276595744681 | 1994 | 2.1276595744681 | 1993 | 2.1276595744681 | 1992 | 2.1276595744681 | 1991 | 2.1276595744681 | 1990 | 2.1276595744681 | 1989 | 2.1276595744681 | 1988 | 2.1276595744681 | 1987 | 2.1276595744681 | 1986 | 2.1276595744681 | 1985 | 2.1276595744681 | 1984 | 2.1276595744681 | 1983 | 2.1276595744681 | 1982 | 2.1276595744681 | 1981 | 2.1276595744681 | 1980 | 2.1276595744681 | 1979 | 2.1276595744681 | 1978 | 2.1276595744681 | 1977 | 2.1276595744681 | 1976 | 2.1276595744681 | 1975 | 2.1276595744681 | 1974 | 2.1276595744681 | 1973 | 2.1276595744681 | 1972 | 2.1276595744681 | 1971 | 2.1276595744681 | 1970 | 2.1276595744681 | 1969 | 2.1276595744681 | 1968 | 2.1276595744681 | 1967 | 2.1276595744681 | 1966 | 2.1276595744681 | 1965 | 2.1276595744681 | 1964 | 2.1276595744681 | 1963 | 2.1276595744681 | 1962 | 2.1276595744681 | 1961 | 2.1276595744681 |
|