Year	Number
1950	77.846
1951	77.3
1952	75.397
1953	73.062
1954	71.03
1955	69.661
1956	68.936
1957	68.927
1958	69.395
1959	69.87
1960	69.909
1961	72.453
1962	73.69
1963	73.725
1964	73.175
1965	72.659
1966	72.988
1967	73.505
1968	74.344
1969	75.3
1970	76.227
1971	79.588
1972	81.803
1973	83.066
1974	83.778
1975	84.275
1976	86.101
1977	88.077
1978	90.044
1979	91.583
1980	92.509
1981	95.13
1982	96.421
1983	96.844
1984	97.002
1985	97.223
1986	97.159
1987	97.017
1988	96.832
1989	96.39
1990	95.526
1991	96.899
1992	97.741
1993	98.023
1994	97.844
1995	97.337
1996	97.368
1997	96.951
1998	96.233
1999	95.382
2000	94.548
2001	94.852
2002	94.96
2003	94.964
2004	94.924
2005	94.861
2006	95.354
2007	95.701
2008	95.873
2009	95.839
2010	95.618
2011	95.687
2012	95.546
2013	95.228
2014	94.759
2015	94.168
2016	94.025
2017	93.603
2018	92.978
2019	92.249
2020	91.469
2021	90.9
2022	90.267
2023	89.535
2024	88.652
2025	87.617
2026	86.859
2027	85.905
2028	84.827
2029	83.716
2030	82.627
2031	81.833
2032	80.998
2033	80.113
2034	79.154
2035	78.121
2036	77.294
2037	76.362
2038	75.367
2039	74.357
2040	73.362
2041	72.598
2042	71.795
2043	70.954
2044	70.072
2045	69.155
2046	68.413
2047	67.606
2048	66.746
2049	65.848
2050	64.926
2051	64.16
2052	63.348
2053	62.504
2054	61.643
2055	60.778
2056	60.075
2057	59.344
2058	58.599
2059	57.856
2060	57.127
2061	56.561
2062	55.981
2063	55.398
2064	54.821
2065	54.26
2066	53.844
2067	53.422
2068	53
2069	52.581
2070	52.171
2071	51.896
2072	51.605
2073	51.308
2074	51.02
2075	50.751
2076	50.604
2077	50.45
2078	50.29
2079	50.124
2080	49.956
2081	49.883
2082	49.788
2083	49.678
2084	49.563
2085	49.45
2086	49.433
2087	49.395
2088	49.344
2089	49.289
2090	49.239
2091	49.282
2092	49.308
2093	49.325
2094	49.337
2095	49.351
2096	49.466
2097	49.561
2098	49.644
2099	49.722
2100	49.804