Year	years
1960	65.116
1961	64.681
1962	65.41
1963	66.04
1964	65.922
1965	66.25
1966	66.511
1967	67.113
1968	66.569
1969	66.655
1970	67.092
1971	67.441
1972	66.831
1973	67.815
1974	68.734
1975	69.179
1976	69.143
1977	69.086
1978	69.447
1979	70.409
1980	69.908
1981	69.896
1982	70.574
1983	70.406
1984	70.163
1985	70.156
1986	70.743
1987	71.243
1988	70.756
1989	71.162
1990	70.401
1991	71.399
1992	70.785
1993	71.242
1994	71.322
1995	71.632
1996	71.93
1997	70.872
1998	71.866
1999	70.668
2000	71.761
2001	72.539
2002	73.863
2003	72.824
2004	74.489
2005	74.814
2006	74.204
2007	74.685
2008	74.773
2009	76.757
2010	76.138
2011	76.41
2012	76.704
2013	77.069
2014	77.407
2015	77.93
2016	77.674
2017	77.694
2018	77.353
2019	77.697
2020	77.881
2021	76.403
2022	78.153