Year	years
1960	60.633
1961	61.069
1962	61.404
1963	61.72
1964	62.019
1965	62.257
1966	62.444
1967	62.628
1968	62.77
1969	62.89
1970	63.002
1971	63.1
1972	63.204
1973	63.254
1974	63.348
1975	63.417
1976	63.491
1977	63.578
1978	63.709
1979	63.814
1980	63.962
1981	64.04
1982	64.164
1983	64.235
1984	64.345
1985	64.502
1986	64.682
1987	64.88
1988	65.033
1989	65.216
1990	65.422
1991	65.65
1992	66.045
1993	66.381
1994	66.646
1995	66.494
1996	66.731
1997	67.043
1998	67.552
1999	67.612
2000	68.01
2001	68.342
2002	68.141
2003	68.004
2004	68.504
2005	68.675
2006	69.17
2007	69.776
2008	69.799
2009	70.022
2010	70.237
2011	70.518
2012	70.814
2013	71.118
2014	71.316
2015	71.632
2016	71.882
2017	72.207
2018	72.439
2019	72.658
2020	72.118
2021	69.104
2022	69.399