Year	years
1960	71.31341463414634
1961	71.6448780487805
1962	71.19609756097562
1963	71.18756097560977
1964	72.0778048780488
1965	72.20170731707317
1966	72.33560975609757
1967	72.63658536585366
1968	72.59024390243903
1969	72.61268292682927
1970	73.02024390243903
1971	73.13073170731708
1972	73.64439024390245
1973	73.94097560975611
1974	74.28707317073172
1975	74.66560975609757
1976	74.78536585365855
1977	75.23804878048782
1978	75.18731707317075
1979	75.46609756097561
1980	75.45926829268295
1981	75.69317073170733
1982	76.0339024390244
1983	76.03121951219514
1984	76.60853658536587
1985	76.73365853658538
1986	76.89902439024391
1987	77.19756097560976
1988	77.22658536585367
1989	77.42121951219514
1990	77.24243902439024
1991	77.51463414634145
1992	77.80609756097562
1993	78.08536585365856
1994	78.35000000000001
1995	78.41707317073171
1996	78.89609756097562
1997	79.07951219512196
1998	79.32439024390246
1999	79.58048780487805
2000	79.68048780487806
2001	80.18048780487806
2002	80.38536585365854
2003	80.53658536585368
2004	81.0878048780488
2005	81.23658536585367
2006	81.49024390243903
2007	81.74146341463415
2008	81.99268292682927
2009	82.0439024390244
2010	82.24634146341465
2011	82.69512195121952
2012	82.69756097560976
2013	82.79756097560977
2014	83.19756097560976
2015	82.89756097560976
2016	83.60243902439025
2017	83.55121951219512
2018	83.75365853658538
2019	83.90487804878049
2020	83
2021	83.75121951219514
2022	83.45365853658537