Year	years
1960	61.089
1961	61.159
1962	61.568
1963	61.76
1964	61.878
1965	62.144
1966	62.325
1967	62.571
1968	62.781
1969	62.718
1970	63.008
1971	63.125
1972	63.044
1973	63.324
1974	64.922
1975	64.417
1976	63.526
1977	64.234
1978	65.403
1979	65.181
1980	65.252
1981	65.411
1982	64.844
1983	65.499
1984	65.081
1985	64.998
1986	65.841
1987	65.433
1988	66.086
1989	65.777
1990	66.122
1991	66.342
1992	66.007
1993	66.385
1994	65.77
1995	66.701
1996	66.156
1997	66.525
1998	66.474
1999	66.064
2000	66.453
2001	66.781
2002	67.201
2003	66.686
2004	67.722
2005	67.866
2006	68.271
2007	68.586
2008	68.192
2009	69.51
2010	69.309
2011	70.078
2012	70.635
2013	70.78
2014	70.963
2015	71.052
2016	70.879
2017	70.782
2018	70.299
2019	70.828
2020	70.983
2021	69.662
2022	71.307