Year	years
1960	48.525
1961	49.703
1962	50.213
1963	50.723
1964	51.478
1965	52.175
1966	52.706
1967	53.234
1968	53.735
1969	54.345
1970	55.031
1971	55.729
1972	56.234
1973	56.892
1974	57.52
1975	58.131
1976	58.772
1977	59.089
1978	59.344
1979	59.633
1980	60.242
1981	60.796
1982	61.534
1983	62.272
1984	63.193
1985	64.07
1986	64.941
1987	66.047
1988	66.226
1989	66.563
1990	66.759
1991	66.94
1992	67.03
1993	67.065
1994	67.121
1995	66.544
1996	67.205
1997	68.228
1998	68.746
1999	68.575
2000	68.434
2001	68.798
2002	69.13
2003	69.371
2004	69.33
2005	70.039
2006	70.952
2007	71.162
2008	71.45
2009	71.817
2010	72.092
2011	72.352
2012	72.68
2013	72.958
2014	73.27
2015	73.544
2016	73.688
2017	74.071
2018	74.315
2019	74.638
2020	74.954
2021	74.518
2022	75.473