Year	years
1960	70.34878048780489
1961	70.51268292682927
1962	69.78682926829268
1963	70.30439024390246
1964	70.45951219512196
1965	70.16317073170732
1966	70.38487804878051
1967	70.26414634146342
1968	69.84073170731708
1969	69.3670731707317
1970	69.44024390243904
1971	69.67707317073173
1972	70.17658536585368
1973	70.02268292682928
1974	70.08658536585367
1975	70.41463414634148
1976	70.53268292682928
1977	70.57341463414635
1978	70.64390243902439
1979	70.74951219512195
1980	70.27804878048781
1981	70.72219512195123
1982	70.80780487804878
1983	70.59146341463415
1984	70.83756097560976
1985	71.04634146341463
1986	70.99731707317073
1987	71.44560975609757
1988	71.64146341463416
1989	71.67560975609757
1990	71.38390243902441
1991	71.89829268292684
1992	72.27170731707318
1993	72.76780487804879
1994	72.97268292682926
1995	73.0748780487805
1996	73.71463414634147
1997	73.8248780487805
1998	74.51463414634146
1999	74.66829268292683
2000	74.96829268292684
2001	75.17317073170733
2002	75.22195121951219
2003	75.17073170731709
2004	75.7219512195122
2005	75.92439024390245
2006	76.52439024390245
2007	76.72439024390246
2008	76.97560975609757
2009	77.0780487804878
2010	77.42439024390245
2011	77.87317073170732
2012	78.07560975609758
2013	78.17560975609756
2014	78.82439024390244
2015	78.5780487804878
2016	79.02682926829269
2017	78.97804878048781
2018	79.02926829268293
2019	79.22926829268295
2020	78.17560975609756
2021	77.2219512195122
2022	79.02926829268293