Year	years
1960	53.861
1961	54.397
1962	54.856
1963	55.319
1964	53.036
1965	56.147
1966	56.453
1967	56.964
1968	57.374
1969	57.804
1970	58.232
1971	58.66
1972	59.068
1973	59.449
1974	59.84
1975	60.262
1976	60.616
1977	60.953
1978	61.187
1979	61.513
1980	61.819
1981	62.12
1982	62.444
1983	62.764
1984	63.139
1985	63.461
1986	63.778
1987	64.051
1988	64.363
1989	64.648
1990	64.894
1991	65.141
1992	65.605
1993	65.929
1994	66.204
1995	66.552
1996	66.85
1997	67.146
1998	67.461
1999	67.76
2000	68.063
2001	68.349
2002	68.615
2003	68.845
2004	69.036
2005	69.136
2006	69.385
2007	69.481
2008	69.55
2009	67.844
2010	69.702
2011	69.77
2012	69.709
2013	69.916
2014	70.015
2015	70.077
2016	70.107
2017	70.158
2018	70.211
2019	69.767
2020	70.341
2021	70.312
2022	70.146