Year	years
1960	60.605
1961	60.906
1962	60.962
1963	60.863
1964	61.561
1965	61.693
1966	61.789
1967	61.882
1968	62.504
1969	62.587
1970	62.586
1971	62.632
1972	63.225
1973	63.81
1974	64.031
1975	64.22
1976	64.433
1977	64.635
1978	64.794
1979	64.949
1980	65.095
1981	65.236
1982	65.823
1983	66.067
1984	66.251
1985	66.475
1986	66.7
1987	66.874
1988	67.454
1989	67.701
1990	67.949
1991	68.103
1992	68.302
1993	68.466
1994	68.6
1995	68.609
1996	68.88
1997	68.395
1998	68.639
1999	68.511
2000	73.4
2001	74.5
2002	74.4
2003	74.4
2004	74.7
2005	74.3
2006	75.3
2007	73.4
2008	73.7
2009	74.1
2010	74.5
2011	75
2012	75.2
2013	75.4
2014	75.6
2015	75.7
2016	75.9
2017	76.1
2018	76.3
2019	76.4
2020	76.6
2021	76.8
2022	77.1