Year	Years
1950	38.607
1951	38.72
1952	38.929
1953	39.103
1954	39.242
1955	39.348
1956	39.425
1957	39.478
1958	39.515
1959	39.555
1960	39.613
1961	39.705
1962	39.835
1963	39.994
1964	40.15
1965	40.306
1966	40.468
1967	40.581
1968	40.547
1969	40.249
1970	39.319
1971	37.325
1972	34.187
1973	30.088
1974	25.398
1975	20.926
1976	17.657
1977	16.286
1978	17.162
1979	20.253
1980	25.118
1981	30.987
1982	36.847
1983	41.889
1984	45.743
1985	48.263
1986	49.589
1987	50.23
1988	50.623
1989	50.916
1990	51.213
1991	51.55
1992	51.882
1993	52.192
1994	52.519
1995	52.908
1996	53.387
1997	53.958
1998	54.616
1999	55.361
2000	56.186
2001	57.078
2002	58.007
2003	58.941
2004	59.858
2005	60.738
2006	61.566
2007	62.34
2008	63.058
2009	63.715
2010	64.307
2011	64.833
2012	65.303
2013	65.729
2014	66.116
2015	66.474
2016	66.809
2017	67.127
2018	67.431
2019	67.728
2020	68.021
2021	68.309
2022	68.589
2023	68.861
2024	69.124
2025	69.379
2026	69.626
2027	69.867
2028	70.102
2029	70.332
2030	70.557
2031	70.778
2032	70.996
2033	71.21
2034	71.422
2035	71.633
2036	71.842
2037	72.051
2038	72.259
2039	72.466
2040	72.672
2041	72.877
2042	73.079
2043	73.278
2044	73.474
2045	73.668
2046	73.859
2047	74.048
2048	74.236
2049	74.423
2050	74.609
2051	74.794
2052	74.978
2053	75.16
2054	75.342
2055	75.524
2056	75.707
2057	75.89
2058	76.075
2059	76.261
2060	76.448
2061	76.636
2062	76.825
2063	77.014
2064	77.203
2065	77.391
2066	77.579
2067	77.766
2068	77.951
2069	78.136
2070	78.321
2071	78.505
2072	78.69
2073	78.876
2074	79.062
2075	79.247
2076	79.432
2077	79.616
2078	79.798
2079	79.979
2080	80.158
2081	80.337
2082	80.515
2083	80.693
2084	80.872
2085	81.05
2086	81.227
2087	81.403
2088	81.576
2089	81.747
2090	81.915
2091	82.08
2092	82.242
2093	82.401
2094	82.557
2095	82.711
2096	82.862
2097	83.009
2098	83.155
2099	83.297