Year	years
1960	59.926
1961	61.095
1962	62.569
1963	59.459
1964	65.86
1965	65.986
1966	65.928
1967	67.017
1968	65.539
1969	64.837
1970	67.231
1971	65.194
1972	69.284
1973	69.958
1974	70.635
1975	71.805
1976	71.827
1977	70.725
1978	72.793
1979	73.038
1980	74.263
1981	75.204
1982	74.488
1983	74.828
1984	72.923
1985	72.449
1986	74.497
1987	74.068
1988	74.479
1989	72.599
1990	72.51
1991	71.873
1992	73.616
1993	73.856
1994	73.542
1995	74.438
1996	74.479
1997	74.074
1998	73.797
1999	73.165
2000	75.051
2001	74.493
2002	75.389
2003	73.838
2004	74.462
2005	75.529
2006	76.113
2007	74.739
2008	76.214
2009	74.726
2010	74.889
2011	72.974
2012	73.215
2013	71.31
2014	72.118
2015	71.082
2016	73.019
2017	69.647
2018	77.247
2019	77.205
2020	77.26
2021	76.301
2022	76.451