Year	years
1960	69.903
1961	68.597
1962	70.3
1963	69.491
1964	70.413
1965	70.457
1966	70.146
1967	70.531
1968	71.805
1969	71.131
1970	71.688
1971	71.384
1972	73.165
1973	72.581
1974	73.02
1975	73.143
1976	72.967
1977	73.512
1978	73.637
1979	74.025
1980	74.475
1981	74.206
1982	72.182
1983	73.847
1984	74.623
1985	75.891
1986	75.672
1987	76.575
1988	76.702
1989	77.483
1990	78.38
1991	77.667
1992	77.435
1993	79.357
1994	78.354
1995	79.8
1996	79.8
1997	80.3
1998	80.2
1999	79.6
2000	80.5
2001	81.2
2002	81.3
2003	80.8
2004	81.2
2005	81.4
2006	82
2007	82.2
2008	82.3
2009	82.7
2010	83.6
2011	83
2012	83
2013	84
2014	84.3
2015	84.1
2016	84.4
2017	84.6
2018	84.6
2019	84.6
2020	84.5
2021	84.3
2022	84.8