Year	years
1960	62.931
1961	63.332
1962	63.629
1963	63.945
1964	64.153
1965	64.467
1966	64.774
1967	65.088
1968	65.405
1969	65.719
1970	66.037
1971	66.353
1972	66.676
1973	66.994
1974	67.358
1975	67.624
1976	67.934
1977	68.241
1978	68.561
1979	68.912
1980	69.231
1981	69.508
1982	69.831
1983	70.202
1984	70.588
1985	70.855
1986	71.15
1987	71.513
1988	71.841
1989	72.165
1990	72.489
1991	72.813
1992	73.135
1993	73.475
1994	73.794
1995	74.111
1996	74.443
1997	74.766
1998	74.514
1999	75.018
2000	75.773
2001	76.109
2002	76.312
2003	76.639
2004	76.962
2005	77.276
2006	77.141
2007	78.301
2008	79.412
2009	80.223
2010	80.274
2011	80.48
2012	81.043
2013	81.433
2014	81.694
2015	81.632
2016	81.494
2017	81.264
2018	81.028
2019	81.326
2020	79.268
2021	79.553
2022	81.742