Year	years
1960	58.231
1961	58.589
1962	59.085
1963	59.551
1964	60.054
1965	60.58
1966	61.132
1967	61.66
1968	62.185
1969	62.737
1970	63.232
1971	63.661
1972	63.983
1973	64.242
1974	64.595
1975	64.844
1976	65.127
1977	65.302
1978	65.578
1979	65.782
1980	65.961
1981	66.132
1982	66.072
1983	66.369
1984	66.482
1985	66.626
1986	66.752
1987	66.884
1988	67.026
1989	67.162
1990	67.294
1991	67.518
1992	67.686
1993	67.855
1994	68.014
1995	68.17
1996	68.323
1997	68.49
1998	68.642
1999	68.809
2000	68.978
2001	69.127
2002	69.335
2003	69.495
2004	69.67
2005	69.768
2006	69.894
2007	70.048
2008	70.164
2009	70.012
2010	70.323
2011	70.381
2012	70.442
2013	70.505
2014	70.54
2015	70.607
2016	70.661
2017	70.713
2018	70.779
2019	70.871
2020	70.928
2021	70.986
2022	71.27