Year	years
1960	43.906
1961	44.385
1962	45.023
1963	45.636
1964	46.497
1965	47.46
1966	48.369
1967	49.297
1968	50.101
1969	50.342
1970	50.713
1971	51.215
1972	51.498
1973	51.87
1974	52.246
1975	52.516
1976	52.982
1977	53.305
1978	53.474
1979	53.944
1980	54.362
1981	54.646
1982	54.955
1983	55.202
1984	55.472
1985	55.642
1986	55.877
1987	56.076
1988	56.085
1989	56.565
1990	56.661
1991	57.014
1992	57.251
1993	57.631
1994	57.956
1995	58.259
1996	58.941
1997	59.243
1998	59.794
1999	59.881
2000	60.155
2001	60.416
2002	60.725
2003	60.98
2004	61.25
2005	61.599
2006	61.893
2007	62.371
2008	56.506
2009	63.155
2010	63.329
2011	63.901
2012	64.141
2013	64.815
2014	65.056
2015	65.561
2016	65.685
2017	65.843
2018	66.465
2019	66.61
2020	66.797
2021	65.672
2022	67.256