Year	years
1960	62.758
1961	63.264
1962	63.637
1963	64.525
1964	64.812
1965	65.542
1966	66.362
1967	66.347
1968	66.625
1969	66.351
1970	66.8
1971	66.637
1972	67.542
1973	67.816
1974	68.451
1975	68.484
1976	68.768
1977	68.513
1978	68.262
1979	67.756
1980	68.474
1981	68.111
1982	67.907
1983	67.619
1984	69.059
1985	70.449
1986	70.784
1987	71.811
1988	71.939
1989	71.394
1990	70.562
1991	70.127
1992	69.66
1993	70.085
1994	70.187
1995	70.189
1996	70.064
1997	69.782
1998	69.363
1999	69.471
2000	71.058
2001	71.266
2002	70.906
2003	71.161
2004	71.482
2005	71.3
2006	71.4
2007	71.9
2008	72.6
2009	72.9
2010	73.6
2011	73.3
2012	74.2
2013	74.1
2014	74.1
2015	74.4
2016	74.1
2017	73.9
2018	74.5
2019	74
2020	73.2
2021	70.8
2022	73.7