Year	years
1960	69.1239024390244
1961	69.76024390243904
1962	69.14975609756098
1963	69.24804878048782
1964	70.31170731707319
1965	70.17170731707319
1966	70.92609756097562
1967	70.95658536585367
1968	70.78
1969	70.81195121951221
1970	71.55878048780488
1971	71.80682926829269
1972	72.07536585365855
1973	72.02634146341464
1974	72.73439024390245
1975	72.64731707317075
1976	72.9919512195122
1977	73.36463414634147
1978	73.69317073170733
1979	74.00268292682927
1980	73.94317073170733
1981	74.3539024390244
1982	74.81463414634148
1983	74.64024390243902
1984	75.38951219512195
1985	75.47073170731709
1986	75.77073170731707
1987	76.21951219512196
1988	76.37073170731708
1989	76.81951219512197
1990	76.97073170731707
1991	77.01951219512195
1992	77.41951219512197
1993	77.72195121951219
1994	77.92195121951221
1995	78.17073170731707
1996	78.52195121951222
1997	78.82439024390244
1998	78.97560975609755
1999	79.42439024390244
2000	79.77804878048782
2001	80.12682926829268
2002	80.22926829268295
2003	79.98292682926831
2004	80.78048780487806
2005	80.78292682926829
2006	81.28292682926829
2007	81.43414634146342
2008	81.48536585365855
2009	81.63658536585366
2010	82.03658536585367
2011	82.1878048780488
2012	82.23902439024391
2013	82.69024390243902
2014	83.09024390243904
2015	82.5439024390244
2016	83.24390243902438
2017	82.94634146341465
2018	83.34634146341465
2019	83.49756097560977
2020	82.19512195121952
2021	82.64634146341464
2022	82.9