Year	years
1960	59.146
1961	59.617
1962	59.943
1963	60.531
1964	61.022
1965	60.877
1966	60.679
1967	61.162
1968	61.524
1969	62.01
1970	61.966
1971	62.379
1972	62.285
1973	62.64
1974	62.839
1975	63.475
1976	63.813
1977	64.596
1978	65.288
1979	66.295
1980	66.581
1981	66.781
1982	67.045
1983	67.292
1984	67.532
1985	67.801
1986	68.054
1987	68.328
1988	68.662
1989	68.986
1990	69.621
1991	69.458
1992	69.725
1993	70.091
1994	70.159
1995	70.399
1996	70.339
1997	70.592
1998	70.846
1999	71.323
2000	71.678
2001	72.435
2002	72.73
2003	73.774
2004	74.462
2005	74.603
2006	74.396
2007	74.381
2008	74.388
2009	74.198
2010	73.576
2011	73.217
2012	73.16
2013	73.272
2014	73.202
2015	73.076
2016	73.339
2017	73.608
2018	73.887
2019	74.164
2020	72.197
2021	72.982
2022	74.838