Year	years
1960	70.26978048780488
1961	70.7239024390244
1962	70.27029268292684
1963	70.63341463414635
1964	71.0198780487805
1965	70.23526829268293
1966	70.37743902439026
1967	70.92558536585366
1968	70.43675609756099
1969	69.79539024390245
1970	69.71258536585366
1971	69.86256097560977
1972	70.29821951219513
1973	70.02139024390245
1974	70.17817073170733
1975	70.30504878048781
1976	70.46319512195122
1977	70.42312195121951
1978	70.42643902439025
1979	70.74473170731709
1980	70.40853658536587
1981	70.62926829268294
1982	70.6890243902439
1983	70.47902439024392
1984	70.75097560975611
1985	70.73463414634146
1986	71.02121951219513
1987	71.08878048780488
1988	71.20780487804879
1989	71.02634146341464
1990	70.93268292682927
1991	70.8829268292683
1992	71.79512195121953
1993	72.4487804878049
1994	72.30000000000001
1995	72.25365853658538
1996	72.65365853658537
1997	72.7048780487805
1998	72.55121951219513
1999	72.90243902439025
2000	73.05121951219513
2001	73.40243902439026
2002	73.60487804878049
2003	73.60487804878049
2004	73.95853658536586
2005	73.90487804878049
2006	74.2048780487805
2007	74.20731707317074
2008	74.7048780487805
2009	74.90975609756099
2010	75.11219512195122
2011	75.95853658536586
2012	76.10975609756099
2013	76.41219512195123
2014	76.81219512195123
2015	76.56341463414634
2016	77.16585365853659
2017	77.16585365853659
2018	77.2658536585366
2019	77.66585365853659
2020	76.86585365853658
2021	74.61463414634147
2022	77.0658536585366