Year	years
1960	62.238
1961	62.673
1962	62.845
1963	63.584
1964	64.138
1965	64.405
1966	64.665
1967	64.655
1968	64.329
1969	64.41
1970	64.627
1971	64.717
1972	65.046
1973	65.506
1974	65.859
1975	66.109
1976	66.701
1977	67.025
1978	67.314
1979	67.784
1980	68.08
1981	68.593
1982	69.031
1983	69.035
1984	69.005
1985	69.355
1986	69.595
1987	70.354
1988	70.605
1989	71.064
1990	71.19
1991	70.941
1992	71.037
1993	70.753
1994	70.47
1995	70.224
1996	69.919
1997	69.627
1998	69.259
1999	69.132
2000	69.082
2001	68.782
2002	68.662
2003	68.429
2004	68.249
2005	68.454
2006	68.684
2007	69.189
2008	69.629
2009	70.114
2010	70.579
2011	71.176
2012	72.01
2013	72.234
2014	71.727
2015	70.798
2016	70.121
2017	69.916
2018	69.695
2019	69.668
2020	69.818
2021	68.469
2022	68.532