Year	Number
1950	97.94
1951	99.059
1952	99.897
1953	100.614
1954	101.22
1955	101.622
1956	101.884
1957	102.147
1958	102.275
1959	102.19
1960	101.875
1961	101.69
1962	100.884
1963	99.647
1964	98.129
1965	96.331
1966	94.621
1967	92.667
1968	90.461
1969	87.979
1970	85.264
1971	83.309
1972	81.14
1973	78.841
1974	76.533
1975	74.316
1976	73.879
1977	73.4
1978	72.876
1979	72.357
1980	71.899
1981	71.657
1982	71.472
1983	71.512
1984	71.731
1985	71.898
1986	71.858
1987	71.698
1988	71.4
1989	71.002
1990	70.564
1991	69.782
1992	68.99
1993	68.068
1994	66.907
1995	65.533
1996	65.22
1997	64.582
1998	63.814
1999	63.118
2000	62.499
2001	60.072
2002	58.052
2003	56.27
2004	54.579
2005	53.005
2006	52.939
2007	52.652
2008	52.193
2009	51.656
2010	51.124
2011	51.513
2012	51.848
2013	52.177
2014	52.517
2015	52.848
2016	53.054
2017	53.288
2018	53.496
2019	53.618
2020	53.642
2021	53.678
2022	53.634
2023	53.519
2024	53.375
2025	53.237
2026	53.231
2027	53.222
2028	53.199
2029	53.145
2030	53.053
2031	53.046
2032	53.011
2033	52.952
2034	52.871
2035	52.768
2036	52.755
2037	52.72
2038	52.682
2039	52.669
2040	52.701
2041	52.869
2042	53.073
2043	53.304
2044	53.558
2045	53.836
2046	54.246
2047	54.684
2048	55.106
2049	55.461
2050	55.718
2051	55.974
2052	56.132
2053	56.224
2054	56.303
2055	56.399
2056	56.587
2057	56.8
2058	57.003
2059	57.15
2060	57.219
2061	57.286
2062	57.303
2063	57.285
2064	57.267
2065	57.274
2066	57.359
2067	57.464
2068	57.617
2069	57.856
2070	58.208
2071	58.715
2072	59.342
2073	60.053
2074	60.796
2075	61.53
2076	62.298
2077	63.081
2078	63.849
2079	64.583
2080	65.274
2081	65.934
2082	66.552
2083	67.137
2084	67.697
2085	68.232
2086	68.701
2087	69.169
2088	69.623
2089	70.066
2090	70.514
2091	70.9
2092	71.302
2093	71.725
2094	72.175
2095	72.655
2096	73.061
2097	73.512
2098	74.001
2099	74.514
2100	75.043