Year	years
1960	57.84140879267924
1961	58.165893875836396
1962	58.337644171470416
1963	58.720488329092895
1964	59.115815967076585
1965	59.25113192182403
1966	59.41756428436184
1967	59.48308442476146
1968	59.613275646210894
1969	59.59022184708232
1970	59.723856943435905
1971	60.055910781576436
1972	60.28149503009076
1973	60.533920136401434
1974	60.65570808259838
1975	60.771349813908664
1976	60.96123909481844
1977	61.025814853107114
1978	61.1781534396227
1979	61.23363594841223
1980	61.78563046450588
1981	62.05691408810091
1982	62.36441186290256
1983	62.582817455860685
1984	62.7260034162246
1985	63.154615519060236
1986	63.93757446890394
1987	64.26825372603305
1988	64.27461763357607
1989	64.53821050632963
1990	64.50998793536492
1991	64.19898195006068
1992	63.1520865650446
1993	62.78043934008921
1994	63.20025644770532
1995	63.088346910205416
1996	63.476608713532165
1997	63.90292185882228
1998	64.43490593082113
1999	64.45814293852045
2000	64.97032273840973
2001	65.296934931846
2002	65.63194400126076
2003	65.87727784278829
2004	66.13588497180179
2005	66.2091631550023
2006	66.55003190952503
2007	66.86405851090673
2008	67.21140265678865
2009	67.76999964302004
2010	68.26949687731216
2011	68.48944198190647
2012	68.98222092362646
2013	69.38922116339772
2014	69.62475141037407
2015	69.81903997769062
2016	70.03296145911835
2017	70.431248778111
2018	70.63093882240246
2019	70.87801103429105
2020	69.21171279801217
2021	69.26908665008771
2022	70.72011291493992