Year	years
1960	41.37158810767465
1961	41.73124288706164
1962	42.06327671654
1963	42.4400532537839
1964	42.898397305561744
1965	43.078888328160055
1966	43.27159167879342
1967	43.47382456851142
1968	43.984972582134084
1969	44.28799099725185
1970	44.70600738042173
1971	45.31182824076929
1972	45.621927628420885
1973	46.37677935425741
1974	46.863859856647416
1975	47.295649633287596
1976	47.885194939388995
1977	48.49798300630587
1978	48.86983126006621
1979	49.22510507256952
1980	49.5719337187053
1981	49.95652389042633
1982	50.16721379551044
1983	49.99485697380333
1984	49.92468637676078
1985	50.061478120902116
1986	50.538499361729485
1987	50.26297624777631
1988	49.85931591337474
1989	50.70559171594411
1990	50.8008910691647
1991	50.59270313718713
1992	50.52998788858175
1993	51.034001465840205
1994	51.69375352133886
1995	51.5343398450386
1996	51.56116474881394
1997	51.74414834707896
1998	51.51728198735567
1999	52.51798046819626
2000	53.01685535133726
2001	53.43203366038699
2002	53.83787831902252
2003	54.373973294442244
2004	54.8306359382256
2005	55.4315172795202
2006	56.08831811309352
2007	56.596086862400476
2008	57.037616778517524
2009	57.71075385723165
2010	58.24331613365942
2011	58.855554967275026
2012	59.364851584493934
2013	59.897372980771976
2014	60.365895716251615
2015	60.72792996866208
2016	61.162845242451986
2017	61.651929637450856
2018	62.03515704439602
2019	62.4316538057646
2020	62.048541178069875
2021	61.734065726693444
2022	62.3412257098832