Year	years
1960	53.628
1961	53.998
1962	54.257
1963	54.542
1964	54.846
1965	55.094
1966	55.347
1967	55.675
1968	56.063
1969	56.484
1970	56.809
1971	57.23
1972	57.637
1973	57.94
1974	58.449
1975	58.876
1976	59.167
1977	59.377
1978	59.531
1979	59.597
1980	59.506
1981	59.456
1982	59.684
1983	59.808
1984	60.093
1985	60.418
1986	60.846
1987	61.254
1988	61.792
1989	61.953
1990	61.879
1991	61.379
1992	55.074
1993	52.867
1994	57.48
1995	59.338
1996	59.129
1997	60.348
1998	61.519
1999	62.621
2000	63.26
2001	64.057
2002	64.846
2003	65.552
2004	66.028
2005	66.514
2006	67.013
2007	67.217
2008	67.688
2009	68.039
2010	67.742
2011	68.148
2012	68.484
2013	68.885
2014	69.069
2015	69.306
2016	69.549
2017	69.905
2018	70.353
2019	70.867
2020	67.994
2021	71.594
2022	71.288