Year	years
1960	61.30941629241064
1961	61.62900304852647
1962	61.78775373078418
1963	62.217720184290066
1964	62.60991866738386
1965	62.72847431543614
1966	62.90030952296123
1967	63.03895575247165
1968	63.21885843298883
1969	63.25265839237391
1970	63.39830911586943
1971	63.71228840235611
1972	63.95445963792846
1973	64.1899443210743
1974	64.38317681807963
1975	64.57068073617765
1976	64.72626041243859
1977	64.88398311332534
1978	65.05931322982757
1979	65.15119825196317
1980	65.66711406487725
1981	65.93196335150081
1982	66.22394112136007
1983	66.4321534821756
1984	66.58359535945416
1985	66.89605640897508
1986	67.58789572649457
1987	67.90450918442086
1988	67.85083912225879
1989	68.28612233038538
1990	68.29618502810794
1991	68.08189890753543
1992	67.3515443274935
1993	67.01790269011346
1994	67.32830419005538
1995	67.25558022681679
1996	67.57318110248787
1997	67.93999129817857
1998	68.39910610232441
1999	68.36502467957514
2000	68.89210391256906
2001	69.19695347566201
2002	69.50649770029291
2003	69.75475096728422
2004	70.02035093475948
2005	70.09322664473129
2006	70.40231143337712
2007	70.70877557729222
2008	71.0024390027901
2009	71.48283562474815
2010	71.87842997045729
2011	72.0742519929248
2012	72.53715881244561
2013	72.94263408785908
2014	73.17490419263967
2015	73.34784353464016
2016	73.56011775463492
2017	73.90620692008899
2018	74.10373587660713
2019	74.33142483756792
2020	72.6714543269783
2021	72.59312502106471
2022	74.10651393979416