Year	Number
1950	49.096
1951	48.8
1952	48.26
1953	47.551
1954	46.875
1955	46.412
1956	46.729
1957	47.063
1958	47.538
1959	48.227
1960	49.14
1961	50.061
1962	51.21
1963	52.481
1964	53.696
1965	54.759
1966	55.973
1967	56.958
1968	57.729
1969	58.307
1970	58.672
1971	59.067
1972	59.07
1973	58.764
1974	58.276
1975	57.676
1976	56.781
1977	56.031
1978	55.19
1979	53.939
1980	52.193
1981	50.715
1982	48.738
1983	46.633
1984	44.9
1985	43.788
1986	43.308
1987	43.297
1988	43.646
1989	44.105
1990	44.507
1991	45.001
1992	45.414
1993	45.725
1994	45.927
1995	46.008
1996	46.067
1997	46.069
1998	46.044
1999	46.058
2000	46.168
2001	46.835
2002	47.519
2003	48.22
2004	48.91
2005	49.545
2006	50.107
2007	50.669
2008	51.176
2009	51.557
2010	51.806
2011	51.827
2012	51.73
2013	51.619
2014	51.624
2015	51.806
2016	52.19
2017	52.756
2018	53.481
2019	54.32
2020	55.247
2021	56.28
2022	57.41
2023	58.644
2024	60.001
2025	61.496
2026	63.049
2027	64.694
2028	66.436
2029	68.247
2030	70.069
2031	71.792
2032	73.576
2033	75.279
2034	76.694
2035	77.715
2036	78.28
2037	78.468
2038	78.399
2039	78.278
2040	78.241
2041	78.079
2042	77.985
2043	78.008
2044	78.176
2045	78.493
2046	78.71
2047	79.122
2048	79.694
2049	80.363
2050	81.094
2051	81.683
2052	82.367
2053	83.108
2054	83.831
2055	84.473
2056	84.831
2057	85.138
2058	85.42
2059	85.697
2060	85.972
2061	86.083
2062	86.278
2063	86.478
2064	86.624
2065	86.731
2066	86.63
2067	86.487
2068	86.362
2069	86.301
2070	86.29
2071	85.949
2072	85.673
2073	85.47
2074	85.337
2075	85.274
2076	84.957
2077	84.767
2078	84.699
2079	84.732
2080	84.86
2081	84.807
2082	84.9
2083	85.11
2084	85.413
2085	85.807
2086	85.981
2087	86.244
2088	86.608
2089	87.067
2090	87.59
2091	87.809
2092	88.107
2093	88.461
2094	88.851
2095	89.275
2096	89.392
2097	89.552
2098	89.765
2099	90.04
2100	90.373