Year	years
1960	48.811
1961	49.695
1962	50.686
1963	51.584
1964	52.848
1965	53.985
1966	55.185
1967	56.339
1968	57.54
1969	58.76
1970	60.021
1971	61.211
1972	62.304
1973	63.351
1974	64.338
1975	65.08
1976	65.82
1977	66.514
1978	67.209
1979	67.846
1980	68.53
1981	69.085
1982	69.66
1983	69.949
1984	70.485
1985	70.747
1986	70.964
1987	71.491
1988	71.606
1989	71.757
1990	71.9
1991	72.241
1992	72.306
1993	72.521
1994	72.598
1995	72.695
1996	72.767
1997	72.937
1998	73.066
1999	73.67
2000	74.38
2001	74.636
2002	74.901
2003	76.222
2004	76.453
2005	76.683
2006	76.909
2007	77.129
2008	77.488
2009	78.003
2010	78.334
2011	78.517
2012	78.716
2013	78.853
2014	79.044
2015	79.223
2016	79.335
2017	79.504
2018	79.627
2019	79.726
2020	78.946
2021	78.71
2022	79.196