Year	years
1960	62.751
1961	63.47
1962	63.819
1963	64.213
1964	64.46
1965	65.161
1966	65.666
1967	66.439
1968	66.701
1969	67.081
1970	68.015
1971	68.467
1972	68.366
1973	68.493
1974	68.568
1975	68.847
1976	69.111
1977	69.147
1978	70.111
1979	71.231
1980	71.868
1981	72.525
1982	73.001
1983	73.525
1984	74.397
1985	74.868
1986	75.517
1987	76.05
1988	76.486
1989	75.537
1990	77.081
1991	77.205
1992	77.51
1993	77.708
1994	77.66
1995	77.578
1996	77.451
1997	77.491
1998	77.41
1999	77.6
2000	75.11
2001	75.608
2002	75.835
2003	76.033
2004	70.576
2005	76.667
2006	77.11
2007	77.259
2008	77.5
2009	74.839
2010	77.596
2011	77.801
2012	78.147
2013	78.619
2014	78.813
2015	78.971
2016	79.355
2017	79.317
2018	79.493
2019	79.743
2020	80.111
2021	79.502
2022	80.23