Year	years
1960	44.984
1961	46.068
1962	47.109
1963	48.065
1964	48.921
1965	49.619
1966	50.186
1967	50.887
1968	51.457
1969	52.004
1970	52.678
1971	53.345
1972	54.016
1973	54.631
1974	55.215
1975	55.65
1976	55.432
1977	55.501
1978	55.547
1979	55.573
1980	55.64
1981	55.693
1982	55.777
1983	56.232
1984	56.687
1985	56.841
1986	56.911
1987	57.388
1988	57.87
1989	58.344
1990	58.765
1991	59.237
1992	59.641
1993	60.038
1994	60.405
1995	60.612
1996	60.305
1997	60.815
1998	61.765
1999	62.529
2000	62.882
2001	63.279
2002	63.518
2003	64.208
2004	64.796
2005	64.879
2006	65.513
2007	65.97
2008	66.382
2009	66.766
2010	67.182
2011	67.439
2012	68.111
2013	68.585
2014	69.047
2015	69.498
2016	69.865
2017	70.237
2018	71.199
2019	71.822
2020	72.141
2021	70.975
2022	72.667