Year	years
1960	59.54523536790744
1961	59.913808449461015
1962	60.44381192606522
1963	60.754078106111514
1964	61.29103537323105
1965	61.89000761688528
1966	62.17179119708658
1967	62.4738311445906
1968	62.77651492750304
1969	62.99509793147253
1970	63.41262902937778
1971	63.712494364418276
1972	64.03913461199745
1973	64.24820848611562
1974	64.44580881525712
1975	64.25287700619141
1976	64.70655867197421
1977	64.88515152074396
1978	64.93030528184133
1979	65.21305513422485
1980	65.99380128183144
1981	66.18336361497266
1982	66.43881215970717
1983	66.7270008336037
1984	67.22726946901379
1985	67.50579385627132
1986	67.75460906715782
1987	68.11791505842434
1988	68.42490674127544
1989	68.57923346034248
1990	68.82025599768544
1991	68.93386914928
1992	69.02584030541026
1993	69.12233198901544
1994	68.87895083165445
1995	69.14572170765393
1996	69.29506280655289
1997	69.36287600680264
1998	69.28931533348604
1999	69.15071332556036
2000	69.87027326893009
2001	70.13018271876032
2002	70.23850520108432
2003	70.30848018183055
2004	70.60917604061149
2005	70.85047287889604
2006	71.15474976590019
2007	71.52934584546999
2008	71.84836011935452
2009	72.18199718905339
2010	72.67844051176337
2011	73.0217681012
2012	73.28130223390743
2013	73.61632002481257
2014	73.96695932080537
2015	74.22478244192742
2016	74.56651761782501
2017	74.94229580006123
2018	75.11403244487614
2019	75.20986801817303
2020	75.14070356374795
2021	74.20530076600093
2022	74.69978772985931