Year	years
1960	44.932
1961	45.783
1962	46.608
1963	47.632
1964	48.595
1965	49.444
1966	50.842
1967	51.901
1968	52.898
1969	53.749
1970	54.76
1971	50.35
1972	55.239
1973	55.486
1974	55.472
1975	55.905
1976	56.113
1977	56.252
1978	56.737
1979	57.146
1980	57.606
1981	58.052
1982	58.416
1983	58.947
1984	59.332
1985	59.363
1986	59.464
1987	59.066
1988	59.356
1989	59.62
1990	60.066
1991	60.259
1992	60.116
1993	59.934
1994	60.116
1995	59.878
1996	60.398
1997	60.603
1998	61.09
1999	61.679
2000	62.102
2001	62.421
2002	62.626
2003	62.843
2004	63.052
2005	62.466
2006	63.731
2007	63.852
2008	64.036
2009	64.14
2010	64.436
2011	64.648
2012	64.782
2013	65.15
2014	65.284
2015	65.697
2016	65.88
2017	66.297
2018	66.482
2019	66.756
2020	66.269
2021	66.098
2022	66.431