Year	years
1960	69.70195121951221
1961	70.52097560975609
1962	70.21951219512196
1963	70.05146341463416
1964	70.75512195121952
1965	70.62536585365855
1966	70.70634146341465
1967	71.01292682926831
1968	70.69317073170733
1969	70.76487804878049
1970	70.9719512195122
1971	71.06048780487806
1972	71.40512195121951
1973	71.63536585365856
1974	71.98585365853658
1975	71.97121951219512
1976	72.119756097561
1977	72.77390243902441
1978	72.69804878048781
1979	73.19365853658537
1980	73.20707317073172
1981	73.62170731707319
1982	73.88804878048782
1983	73.86902439024391
1984	74.40487804878049
1985	74.52024390243903
1986	74.73170731707319
1987	75.3658536585366
1988	75.5658536585366
1989	75.63268292682929
1990	76.0519512195122
1991	76.19219512195123
1992	76.35121951219513
1993	76.34536585365854
1994	76.69170731707318
1995	76.84073170731709
1996	77.18731707317073
1997	77.37073170731709
1998	77.47317073170733
1999	77.61951219512196
2000	77.72195121951219
2001	77.97317073170734
2002	78.07560975609758
2003	78.12926829268292
2004	78.8780487804878
2005	78.98048780487807
2006	79.38048780487804
2007	79.7829268292683
2008	79.68048780487806
2009	80.03414634146341
2010	80.1829268292683
2011	80.58536585365854
2012	80.38536585365854
2013	80.58780487804879
2014	81.28780487804877
2015	80.99268292682929
2016	81.4390243902439
2017	81.49268292682927
2018	81.59512195121953
2019	81.99512195121952
2020	80.69512195121952
2021	81.79024390243904
2022	81.69756097560978