Year	Number
1950	61.72
1951	61.261
1952	60.748
1953	60.653
1954	61.16
1955	62.287
1956	64.732
1957	67.502
1958	70.647
1959	74.224
1960	78.25
1961	82.756
1962	87.596
1963	92.446
1964	96.739
1965	100.08
1966	103.462
1967	105.378
1968	106.163
1969	106.428
1970	106.535
1971	105.097
1972	104.133
1973	103.403
1974	102.351
1975	100.68
1976	99.404
1977	97.351
1978	94.862
1979	92.514
1980	90.638
1981	89.204
1982	88.351
1983	87.947
1984	87.745
1985	87.627
1986	88.197
1987	88.75
1988	89.314
1989	89.88
1990	90.353
1991	91.751
1992	92.629
1993	93.06
1994	93.147
1995	92.916
1996	92.212
1997	91.441
1998	90.396
1999	88.825
2000	86.691
2001	84.203
2002	81.288
2003	78.195
2004	75.274
2005	72.697
2006	70.178
2007	68.102
2008	66.379
2009	64.872
2010	63.538
2011	62.902
2012	62.309
2013	61.738
2014	61.242
2015	60.885
2016	61.431
2017	61.875
2018	62.316
2019	62.816
2020	63.349
2021	63.576
2022	63.917
2023	64.216
2024	64.28
2025	64.039
2026	63.663
2027	63.031
2028	62.196
2029	61.272
2030	60.336
2031	59.414
2032	58.5
2033	57.624
2034	56.806
2035	56.069
2036	55.503
2037	55.019
2038	54.619
2039	54.299
2040	54.052
2041	53.957
2042	53.903
2043	53.902
2044	53.954
2045	54.049
2046	54.219
2047	54.382
2048	54.561
2049	54.79
2050	55.079
2051	55.413
2052	55.794
2053	56.158
2054	56.422
2055	56.542
2056	56.549
2057	56.436
2058	56.233
2059	55.988
2060	55.738
2061	55.517
2062	55.291
2063	55.056
2064	54.799
2065	54.518
2066	54.252
2067	53.971
2068	53.703
2069	53.474
2070	53.303
2071	53.21
2072	53.149
2073	53.147
2074	53.241
2075	53.449
2076	53.768
2077	54.177
2078	54.646
2079	55.124
2080	55.571
2081	55.995
2082	56.399
2083	56.768
2084	57.093
2085	57.375
2086	57.619
2087	57.82
2088	57.987
2089	58.127
2090	58.243
2091	58.318
2092	58.377
2093	58.432
2094	58.496
2095	58.585
2096	58.669
2097	58.773
2098	58.912
2099	59.101
2100	59.35