Year	years
1960	54.32024390243903
1961	54.92400000000001
1962	55.519512195121955
1963	55.974878048780496
1964	57.17478048780489
1965	58.24048780487806
1966	59.504707317073176
1967	61.28812195121952
1968	61.559000000000005
1969	62.05102439024391
1970	62.16341463414635
1971	62.61219512195123
1972	63.00975609756099
1973	63.407317073170745
1974	63.8048780487805
1975	64.15365853658537
1976	64.50243902439024
1977	64.9
1978	65.19756097560976
1979	65.54634146341465
1980	66.04634146341465
1981	66.54634146341465
1982	67.09512195121953
1983	67.54634146341465
1984	68.19512195121952
1985	68.79512195121951
1986	69.44634146341464
1987	69.99756097560976
1988	70.54878048780489
1989	71.04878048780489
1990	71.59756097560977
1991	72.04634146341465
1992	72.49756097560976
1993	72.99756097560977
1994	73.39756097560976
1995	73.70000000000002
1996	74.15121951219513
1997	74.60243902439025
1998	75.00487804878048
1999	75.40975609756099
2000	75.90975609756099
2001	76.41219512195123
2002	76.7658536585366
2003	77.21463414634147
2004	77.66585365853659
2005	78.16829268292683
2006	78.66829268292685
2007	79.11951219512196
2008	79.5170731707317
2009	79.96829268292684
2010	80.11707317073171
2011	80.56829268292685
2012	80.81951219512196
2013	81.27073170731707
2014	81.7219512195122
2015	82.02439024390245
2016	82.27560975609758
2017	82.62682926829268
2018	82.62682926829268
2019	83.22682926829269
2020	83.42682926829269
2021	83.52682926829269
2022	82.68048780487806