Year	years
1960	69.78682926829268
1961	70.03243902439026
1962	69.43048780487804
1963	69.8290243902439
1964	71.02804878048782
1965	70.72658536585368
1966	70.70731707317073
1967	70.3939024390244
1968	70.04292682926831
1969	69.7968292682927
1970	69.83536585365856
1971	70.16463414634147
1972	69.87878048780489
1973	69.81341463414635
1974	69.7409756097561
1975	68.92536585365855
1976	69.0478048780488
1977	69.10463414634147
1978	68.98780487804879
1979	68.49560975609756
1980	68.80853658536586
1981	68.78634146341464
1982	69.32829268292684
1983	69.11902439024392
1984	69.1629268292683
1985	69.29146341463417
1986	70.62243902439026
1987	70.6929268292683
1988	70.61536585365855
1989	70.15536585365855
1990	69.27317073170732
1991	69.03243902439026
1992	68.3960975609756
1993	66.72268292682926
1994	65.66439024390246
1995	66.39121951219514
1996	68.77658536585368
1997	69.34926829268294
1998	69.01219512195122
1999	69.7429268292683
2000	70.31463414634148
2001	70.7609756097561
2002	70.96097560975612
2003	71.2658536585366
2004	72.02682926829269
2005	71.35609756097561
2006	70.8658536585366
2007	71.01951219512196
2008	72.41951219512197
2009	73.08048780487806
2010	73.4829268292683
2011	73.57560975609756
2012	73.77804878048781
2013	73.98292682926831
2014	74.12439024390244
2015	74.48048780487805
2016	74.58048780487805
2017	74.62926829268294
2018	74.7829268292683
2019	75.3878048780488
2020	75.18536585365854
2021	72.98048780487807
2022	74.58048780487805