Year	years
1960	63.693
1961	64.445
1962	65.113
1963	65.845
1964	66.579
1965	67.164
1966	67.773
1967	68.23
1968	68.654
1969	69.079
1970	69.64
1971	70.168
1972	70.761
1973	71.19
1974	71.857
1975	72.457
1976	72.733
1977	73.219
1978	73.357
1979	73.537
1980	73.889
1981	74.04
1982	74.246
1983	74.526
1984	74.13
1985	73.511
1986	74.144
1987	74.252
1988	74.465
1989	74.428
1990	75.4
1991	75.314
1992	64.254
1993	64.383
1994	75.222
1995	74.331
1996	76.205
1997	76.393
1998	76.386
1999	77.871
2000	77.311
2001	77.988
2002	76.83
2003	78.55
2004	78.692
2005	78.332
2006	79.141
2007	78.953
2008	79.607
2009	79.726
2010	79.652
2011	79.382
2012	79.867
2013	78.624
2014	77.709
2015	78.112
2016	78.768
2017	78.958
2018	79.093
2019	79.22
2020	78.414
2021	77.53
2022	77.498