Year	years
1960	73.00560975609757
1961	73.47439024390245
1962	73.35048780487806
1963	73.55536585365854
1964	73.73317073170732
1965	73.86170731707317
1966	74.07853658536585
1967	74.12243902439026
1968	73.97292682926829
1969	74.08487804878051
1970	74.64926829268293
1971	74.6239024390244
1972	74.71804878048782
1973	74.86731707317074
1974	74.98048780487805
1975	74.98463414634148
1976	74.96926829268294
1977	75.37975609756099
1978	75.46902439024392
1979	75.52414634146342
1980	75.7409756097561
1981	76.02609756097561
1982	76.32731707317075
1983	76.55170731707317
1984	76.81585365853661
1985	76.6678048780488
1986	76.93121951219513
1987	77.09219512195124
1988	76.97926829268293
1989	77.72682926829269
1990	77.53682926829269
1991	77.66682926829269
1992	77.99878048780488
1993	78.06048780487805
1994	78.65024390243903
1995	78.74048780487806
1996	78.9590243902439
1997	79.19756097560978
1998	79.33902439024392
1999	79.44146341463416
2000	79.6439024390244
2001	79.79512195121951
2002	79.84634146341465
2003	80.09512195121953
2004	80.49756097560977
2005	80.54634146341465
2006	80.7487804878049
2007	80.90000000000002
2008	81.10000000000001
2009	81.35121951219513
2010	81.45121951219514
2011	81.80243902439025
2012	81.7048780487805
2013	81.9560975609756
2014	82.25365853658538
2015	82.2048780487805
2016	82.30731707317074
2017	82.40975609756099
2018	82.55853658536586
2019	83.10975609756099
2020	82.35609756097561
2021	83.05609756097562
2022	83.10975609756099