Year	years
1960	46.511
1961	47.001
1962	47.567
1963	48.236
1964	48.944
1965	49.662
1966	50.391
1967	51.132
1968	51.826
1969	52.471
1970	53.084
1971	53.619
1972	53.994
1973	54.444
1974	54.72
1975	54.9
1976	55.042
1977	54.483
1978	55.335
1979	55.5
1980	55.701
1981	55.909
1982	56.137
1983	56.398
1984	56.686
1985	56.998
1986	57.348
1987	57.786
1988	58.269
1989	58.764
1990	59.278
1991	59.743
1992	60.195
1993	60.629
1994	61.002
1995	61.322
1996	61.595
1997	61.858
1998	62.12
1999	62.369
2000	62.629
2001	62.879
2002	63.057
2003	63.173
2004	63.209
2005	63.187
2006	63.129
2007	63.064
2008	63.059
2009	63.108
2010	63.243
2011	63.413
2012	63.607
2013	63.816
2014	64.044
2015	64.285
2016	64.514
2017	64.735
2018	64.97
2019	65.295
2020	65.348
2021	65.504
2022	65.731