Year	years
1960	64.409
1961	63.629
1962	64.293
1963	63.522
1964	64.838
1965	64.978
1966	65.273
1967	65.968
1968	65.625
1969	65.193
1970	65.684
1971	65.956
1972	65.371
1973	66.555
1974	65.989
1975	66.918
1976	67.162
1977	67.281
1978	67.511
1979	67.882
1980	68.304
1981	69.079
1982	69.1
1983	69.716
1984	69.88
1985	69.48
1986	70.292
1987	70.678
1988	71.239
1989	70.924
1990	71.959
1991	72.151
1992	73.078
1993	72.31
1994	73.339
1995	73.264
1996	73.756
1997	73.691
1998	74.603
1999	73.666
2000	74.725
2001	75.51
2002	75.42
2003	76.096
2004	76.966
2005	77.623
2006	78.191
2007	78.331
2008	78.449
2009	78.681
2010	78.983
2011	79.19
2012	79.337
2013	79.473
2014	80.037
2015	78.905
2016	80.314
2017	80.457
2018	80.596
2019	80.737
2020	80.588
2021	80.525
2022	80.762