Year	years
1960	47.236
1961	48.064
1962	48.718
1963	49.518
1964	50.513
1965	51.735
1966	53.097
1967	54.407
1968	55.678
1969	56.675
1970	57.368
1971	57.739
1972	49.888
1973	58.095
1974	58.211
1975	58.434
1976	58.785
1977	59.215
1978	58.467
1979	58.648
1980	60.817
1981	61.276
1982	61.685
1983	61.96
1984	62.332
1985	62.87
1986	63.568
1987	64.142
1988	64.954
1989	65.852
1990	66.45
1991	67.014
1992	67.346
1993	67.774
1994	68.271
1995	68.614
1996	69.046
1997	69.505
1998	67.709
1999	70.081
2000	70.189
2001	70.163
2002	70.137
2003	70.179
2004	70.4
2005	70.937
2006	71.753
2007	72.591
2008	73.674
2009	74.545
2010	75.128
2011	75.528
2012	75.707
2013	75.763
2014	75.822
2015	75.925
2016	76.122
2017	76.367
2018	76.681
2019	77.001
2020	75.012
2021	76.803
2022	77.556