Year	Number
1950	53.49
1951	53.058
1952	51.913
1953	50.413
1954	49.045
1955	48.153
1956	48.773
1957	49.443
1958	50.334
1959	51.38
1960	52.401
1961	52.644
1962	53.113
1963	53.589
1964	53.762
1965	53.51
1966	53.394
1967	52.788
1968	51.917
1969	51.169
1970	50.737
1971	50.088
1972	49.825
1973	49.826
1974	49.853
1975	49.787
1976	50.114
1977	50.222
1978	50.176
1979	50.077
1980	49.977
1981	49.81
1982	49.666
1983	49.556
1984	49.444
1985	49.313
1986	49.437
1987	49.428
1988	49.351
1989	49.342
1990	49.46
1991	49.708
1992	50.096
1993	50.428
1994	50.401
1995	49.861
1996	49.2
1997	48.04
1998	46.635
1999	45.375
2000	44.481
2001	44.15
2002	44.153
2003	44.31
2004	44.327
2005	44.035
2006	43.768
2007	43.438
2008	43.128
2009	42.855
2010	42.57
2011	42.701
2012	42.547
2013	42.392
2014	42.604
2015	43.336
2016	44.383
2017	46.008
2018	47.892
2019	49.563
2020	50.756
2021	51.839
2022	52.447
2023	52.696
2024	52.847
2025	53.066
2026	53.578
2027	54.085
2028	54.53
2029	54.778
2030	54.743
2031	54.666
2032	54.381
2033	53.973
2034	53.573
2035	53.279
2036	53.34
2037	53.505
2038	53.752
2039	54.052
2040	54.395
2041	55.056
2042	55.731
2043	56.458
2044	57.272
2045	58.169
2046	59.413
2047	60.704
2048	62.012
2049	63.305
2050	64.564
2051	66.055
2052	67.487
2053	68.781
2054	69.813
2055	70.486
2056	71.036
2057	71.245
2058	71.118
2059	70.692
2060	70.017
2061	69.362
2062	68.49
2063	67.438
2064	66.241
2065	64.928
2066	63.765
2067	62.514
2068	61.284
2069	60.221
2070	59.41
2071	59.154
2072	59.136
2073	59.291
2074	59.514
2075	59.731
2076	60.263
2077	60.803
2078	61.341
2079	61.857
2080	62.327
2081	63.006
2082	63.642
2083	64.21
2084	64.685
2085	65.054
2086	65.49
2087	65.832
2088	66.073
2089	66.206
2090	66.228
2091	66.233
2092	66.145
2093	65.97
2094	65.729
2095	65.444
2096	65.184
2097	64.878
2098	64.558
2099	64.262
2100	64.015