Year	years
1960	50.281
1961	50.788
1962	51.346
1963	51.835
1964	52.265
1965	52.671
1966	53.058
1967	53.446
1968	53.883
1969	54.348
1970	54.779
1971	55.182
1972	55.641
1973	56.077
1974	56.54
1975	57.027
1976	57.489
1977	57.924
1978	58.416
1979	58.97
1980	59.494
1981	60.028
1982	60.525
1983	60.984
1984	61.389
1985	61.783
1986	62.181
1987	62.559
1988	62.929
1989	63.315
1990	63.099
1991	63.442
1992	63.799
1993	64.19
1994	64.637
1995	64.905
1996	65.376
1997	65.743
1998	66.091
1999	66.381
2000	66.262
2001	66.644
2002	66.845
2003	67.206
2004	67.537
2005	68.252
2006	68.545
2007	68.956
2008	69.378
2009	69.664
2010	69.844
2011	70.089
2012	70.287
2013	70.745
2014	71.191
2015	71.124
2016	71.092
2017	71.635
2018	71.956
2019	72.203
2020	70.7
2021	69.56
2022	70.296