Year	years
1960	59.12724578324602
1961	59.48005052233639
1962	60.43031098582009
1963	60.90291332115103
1964	61.60973888051724
1965	61.92042236592347
1966	62.21315313545301
1967	62.5484484953866
1968	62.8376925237826
1969	63.06307958423866
1970	63.297631833538915
1971	63.413816250725695
1972	63.62876652918367
1973	63.79805121015132
1974	64.1031907749799
1975	64.37833210441673
1976	64.59514401920993
1977	64.75183910511402
1978	64.95312353137328
1979	65.12174847784223
1980	65.35554938541995
1981	65.61902238248683
1982	65.82893191753395
1983	65.91457982881882
1984	66.28931797016737
1985	66.3949411849056
1986	66.48700604067815
1987	66.59355179841738
1988	66.80672189305622
1989	66.98889618321506
1990	67.17951755770879
1991	67.27774878675291
1992	67.5274518516204
1993	67.7918557087775
1994	67.94958334467478
1995	67.89365695955318
1996	67.95535493295422
1997	68.01440364502292
1998	68.18229588222574
1999	68.33940030129419
2000	68.54381491758265
2001	68.68740676145049
2002	68.8096222331612
2003	68.84182404250171
2004	69.18380128042949
2005	69.52682725021549
2006	69.94287895286729
2007	70.34272560434185
2008	70.61514545519671
2009	70.9136429057736
2010	71.09376714264137
2011	71.2029769513107
2012	71.35580204236095
2013	71.45310234782305
2014	71.64077196351467
2015	71.88319026592772
2016	72.22208222508867
2017	72.44465398980525
2018	72.7112410753584
2019	72.37374060680034
2020	72.33122751413711
2021	70.4817910938051
2022	71.03467708656056