Year	Number
1950	81.056
1951	78.449
1952	76.062
1953	73.691
1954	71.502
1955	69.666
1956	69.335
1957	69.023
1958	68.865
1959	69.005
1960	69.515
1961	71.8
1962	73.979
1963	76.151
1964	78.343
1965	80.475
1966	83.714
1967	86.939
1968	89.986
1969	92.582
1970	94.609
1971	95.425
1972	95.478
1973	94.946
1974	94.054
1975	92.954
1976	93.12
1977	92.875
1978	92.433
1979	92.106
1980	92.085
1981	92.397
1982	93.186
1983	94.209
1984	95.094
1985	95.694
1986	97.81
1987	99.171
1988	100.029
1989	100.698
1990	101.227
1991	101.438
1992	101.438
1993	101.041
1994	99.957
1995	98.064
1996	95.11
1997	91.689
1998	87.893
1999	83.92
2000	79.924
2001	75.701
2002	71.705
2003	67.95
2004	64.456
2005	61.264
2006	58.526
2007	56.055
2008	53.89
2009	52.07
2010	50.604
2011	49.534
2012	48.709
2013	48.128
2014	47.728
2015	47.449
2016	47.364
2017	47.265
2018	47.173
2019	47.118
2020	47.089
2021	46.868
2022	46.709
2023	46.529
2024	46.227
2025	45.764
2026	45.159
2027	44.447
2028	43.671
2029	42.906
2030	42.206
2031	41.556
2032	40.982
2033	40.497
2034	40.12
2035	39.86
2036	39.716
2037	39.698
2038	39.812
2039	40.049
2040	40.406
2041	40.853
2042	41.389
2043	42.062
2044	42.925
2045	43.999
2046	45.182
2047	46.543
2048	48.064
2049	49.709
2050	51.444
2051	53.128
2052	54.886
2053	56.681
2054	58.457
2055	60.177
2056	61.665
2057	63.081
2058	64.402
2059	65.591
2060	66.629
2061	67.332
2062	67.886
2063	68.327
2064	68.709
2065	69.073
2066	69.237
2067	69.393
2068	69.58
2069	69.862
2070	70.277
2071	70.627
2072	71.097
2073	71.727
2074	72.543
2075	73.54
2076	74.475
2077	75.612
2078	76.889
2079	78.214
2080	79.511
2081	80.579
2082	81.649
2083	82.681
2084	83.638
2085	84.496
2086	85.049
2087	85.521
2088	85.899
2089	86.19
2090	86.41
2091	86.347
2092	86.222
2093	86.07
2094	85.934
2095	85.842
2096	85.496
2097	85.209
2098	85.002
2099	84.896
2100	84.895