Year	years
1960	69.84731707317074
1961	70.10268292682929
1962	69.09536585365854
1963	70.20439024390244
1964	71.50902439024391
1965	71.32512195121951
1966	71.52024390243903
1967	71.6039024390244
1968	71.31365853658538
1969	70.92853658536586
1970	70.80439024390245
1971	71.73536585365855
1972	71.02463414634147
1973	71.33219512195123
1974	71.24414634146342
1975	70.86731707317074
1976	70.95804878048781
1977	70.80951219512195
1978	70.60463414634148
1979	70.48219512195122
1980	70.48219512195122
1981	70.46073170731708
1982	70.8368292682927
1983	70.77780487804878
1984	70.32000000000001
1985	70.50121951219514
1986	72.08073170731707
1987	71.93463414634148
1988	71.76219512195124
1989	71.42536585365855
1990	71.16073170731708
1991	70.36414634146342
1992	70.23439024390245
1993	68.91048780487806
1994	68.53024390243903
1995	69.00634146341466
1996	70.1080487804878
1997	70.9090243902439
1998	71.21951219512195
1999	71.5707317073171
2000	72.01951219512195
2001	71.65853658536585
2002	71.76097560975612
2003	72.06097560975611
2004	71.9609756097561
2005	71.25365853658538
2006	71.05609756097562
2007	70.90000000000002
2008	71.81219512195122
2009	72.91463414634147
2010	73.26829268292683
2011	73.56341463414635
2012	73.86341463414635
2013	73.91463414634146
2014	74.5170731707317
2015	74.32195121951221
2016	74.67073170731707
2017	75.48048780487807
2018	75.68048780487806
2019	76.28292682926829
2020	74.97804878048781
2021	74.03658536585367
2022	75.79268292682927