Year	years
1960	53.821
1961	54.316
1962	54.928
1963	55.515
1964	56.049
1965	56.564
1966	57.052
1967	57.515
1968	57.919
1969	58.227
1970	58.538
1971	58.934
1972	59.352
1973	59.747
1974	60.081
1975	60.297
1976	60.486
1977	60.633
1978	60.742
1979	60.874
1980	61.015
1981	61.18
1982	61.403
1983	61.673
1984	61.93
1985	62.108
1986	62.161
1987	62.137
1988	62.161
1989	62.19
1990	62.176
1991	62.282
1992	62.383
1993	62.476
1994	62.558
1995	62.774
1996	63.034
1997	63.225
1998	63.364
1999	63.48
2000	63.275
2001	63.642
2002	63.719
2003	63.745
2004	63.695
2005	63.585
2006	63.489
2007	63.36
2008	63.236
2009	63.23
2010	63.226
2011	63.256
2012	63.373
2013	63.464
2014	63.623
2015	63.827
2016	64.057
2017	64.27
2018	64.5
2019	64.746
2020	64.977
2021	65.269
2022	65.146