Year	years
1960	65.86629268292683
1961	66.55887804878049
1962	66.97717073170732
1963	67.68573170731707
1964	68.44609756097562
1965	69.25121951219514
1966	69.53887804878049
1967	69.92543902439024
1968	70.35582926829268
1969	70.56856097560976
1970	71.0499512195122
1971	71.4680487804878
1972	71.45097560975611
1973	72.09024390243903
1974	72.59780487804879
1975	73.36219512195122
1976	72.78902439024391
1977	73.34926829268292
1978	73.54073170731708
1979	73.66317073170732
1980	74.65341463414636
1981	75.34902439024391
1982	75.43853658536587
1983	75.28634146341463
1984	76.00951219512196
1985	76.42926829268293
1986	76.68439024390244
1987	76.89780487804877
1988	77.08341463414635
1989	77.02878048780488
1990	77.37073170731709
1991	77.8729268292683
1992	77.67341463414635
1993	78.01609756097561
1994	78.54365853658537
1995	78.67878048780487
1996	79.62756097560977
1997	80.11219512195123
1998	80.10682926829269
1999	80.37268292682928
2000	80.87317073170733
2001	81.41926829268293
2002	81.45219512195125
2003	81.34341463414636
2004	81.79926829268294
2005	81.6090243902439
2006	82.3848780487805
2007	82.36682926829269
2008	82.34048780487805
2009	82.77512195121953
2010	82.95756097560975
2011	83.4119512195122
2012	83.45024390243903
2013	83.83121951219512
2014	83.93560975609756
2015	84.25268292682928
2016	84.21146341463415
2017	84.69560975609757
2018	84.86975609756098
2019	85.1558536585366
2020	85.49634146341464
2021	85.53268292682927
2022	83.66097560975611