Year	years
1960	66.886
1961	65.501
1962	67.225
1963	67.817
1964	67.991
1965	69.133
1966	68.757
1967	69.628
1968	69.883
1969	69.568
1970	70.3
1971	70.1
1972	71.5
1973	70.7
1974	71.4
1975	72.1
1976	72.6
1977	73.7
1978	73.8
1979	74.6
1980	74.8
1981	75.2
1982	76
1983	75.8
1984	76.1
1985	76.4
1986	76.8
1987	77.2
1988	77.3
1989	77.8
1990	77.5
1991	77.6
1992	78
1993	78.2
1994	78.5
1995	79
1996	79
1997	79.1
1998	79.4
1999	79.6
2000	79.9
2001	80.4
2002	80.6
2003	80.6
2004	81
2005	81.4
2006	81.8
2007	81.6
2008	81.7
2009	81.8
2010	82.1
2011	83.8
2012	83.6
2013	84
2014	84.4
2015	84.3
2016	84.3
2017	84.6
2018	84.5
2019	84.8
2020	84.1
2021	84.4
2022	84.5