Year	Number
1950	69.175
1951	68.597
1952	65.69
1953	62.881
1954	61.454
1955	61.643
1956	62.538
1957	64.636
1958	67.379
1959	70.044
1960	72.227
1961	74.42
1962	76.281
1963	77.707
1964	78.633
1965	78.978
1966	79.303
1967	78.886
1968	77.89
1969	76.628
1970	75.3
1971	73.422
1972	71.931
1973	70.626
1974	69.188
1975	67.505
1976	66.557
1977	65.353
1978	64.129
1979	63.185
1980	62.592
1981	61.774
1982	61.262
1983	60.995
1984	60.797
1985	60.559
1986	60.285
1987	60.043
1988	59.854
1989	59.713
1990	59.545
1991	59.87
1992	59.907
1993	59.683
1994	59.224
1995	58.54
1996	57.414
1997	56.152
1998	54.849
1999	53.627
2000	52.588
2001	51.402
2002	50.471
2003	49.626
2004	48.713
2005	47.702
2006	47.035
2007	46.272
2008	45.534
2009	45.023
2010	44.884
2011	45.621
2012	46.557
2013	47.687
2014	48.949
2015	50.27
2016	51.777
2017	53.291
2018	54.696
2019	55.872
2020	56.751
2021	57.1
2022	57.332
2023	57.362
2024	57.132
2025	56.663
2026	56.363
2027	55.782
2028	55.01
2029	54.188
2030	53.389
2031	52.681
2032	52.011
2033	51.421
2034	50.918
2035	50.514
2036	50.34
2037	50.257
2038	50.251
2039	50.303
2040	50.401
2041	50.661
2042	50.942
2043	51.245
2044	51.563
2045	51.886
2046	52.321
2047	52.715
2048	53.103
2049	53.54
2050	54.054
2051	54.738
2052	55.453
2053	56.133
2054	56.689
2055	57.058
2056	57.351
2057	57.485
2058	57.434
2059	57.169
2060	56.694
2061	56.13
2062	55.397
2063	54.553
2064	53.669
2065	52.796
2066	52.051
2067	51.32
2068	50.668
2069	50.174
2070	49.887
2071	49.916
2072	50.119
2073	50.484
2074	50.993
2075	51.629
2076	52.508
2077	53.498
2078	54.542
2079	55.55
2080	56.451
2081	57.32
2082	58.076
2083	58.724
2084	59.279
2085	59.754
2086	60.182
2087	60.528
2088	60.792
2089	60.979
2090	61.098
2091	61.148
2092	61.138
2093	61.086
2094	61.017
2095	60.951
2096	60.878
2097	60.805
2098	60.751
2099	60.737
2100	60.777