Year	years
1960	64.4880574893965
1961	64.72250756608348
1962	64.56461390372795
1963	64.86235789049246
1964	65.34947163450006
1965	65.30588771696392
1966	65.43305183617363
1967	65.39153441134691
1968	65.30314928875902
1969	65.0211465003175
1970	65.43878894335354
1971	65.58584387617393
1972	65.82266299346351
1973	65.93645274910253
1974	66.09270122483701
1975	65.98912494207435
1976	66.10123475898594
1977	66.20816302078016
1978	66.26137935706582
1979	66.34171135657066
1980	66.46122938264719
1981	66.75460709088351
1982	67.0809660871852
1983	67.12545218612921
1984	67.23354636122309
1985	67.52391458956576
1986	68.20880480324934
1987	68.4222915874976
1988	68.48535649500441
1989	68.53482989874561
1990	68.45161051601445
1991	68.38260441840933
1992	68.05666817320619
1993	67.5411893940251
1994	67.58008932545124
1995	67.72751380796645
1996	68.26601004745994
1997	68.77319194256766
1998	69.13856342120877
1999	69.08011958954052
2000	69.30141129845225
2001	69.59987278984171
2002	69.74864043344931
2003	69.90169032371693
2004	70.33133763359812
2005	70.49153929560657
2006	71.05092526114942
2007	71.46132959207696
2008	71.79034493854171
2009	72.24202065404228
2010	72.58018188952236
2011	73.06235632719329
2012	73.32642364616211
2013	73.70217976894243
2014	74.01982167245299
2015	74.02992875880255
2016	74.37255345505933
2017	74.6695943862636
2018	74.80408936770381
2019	75.10282884266765
2020	73.83164026513549
2021	73.65528897079069
2022	74.7960734645677