Year	Number
1950	80.87
1951	81.245
1952	81.193
1953	80.918
1954	80.518
1955	80.01
1956	80.388
1957	80.563
1958	80.532
1959	80.321
1960	79.979
1961	80.678
1962	81.052
1963	81.202
1964	81.228
1965	81.174
1966	81.926
1967	82.45
1968	82.796
1969	83.012
1970	83.136
1971	83.937
1972	84.597
1973	85.119
1974	85.505
1975	85.779
1976	86.615
1977	87.144
1978	87.465
1979	87.675
1980	87.804
1981	88.989
1982	89.971
1983	90.743
1984	91.278
1985	91.559
1986	92.148
1987	92.373
1988	92.283
1989	91.935
1990	91.37
1991	91.269
1992	90.901
1993	90.31
1994	89.548
1995	88.668
1996	88.427
1997	87.995
1998	87.439
1999	86.837
2000	86.243
2001	86.388
2002	86.428
2003	86.399
2004	86.328
2005	86.232
2006	86.726
2007	87.063
2008	87.279
2009	87.408
2010	87.465
2011	87.824
2012	88.066
2013	88.158
2014	88.044
2015	87.708
2016	87.623
2017	87.242
2018	86.639
2019	85.915
2020	85.127
2021	84.513
2022	83.838
2023	83.081
2024	82.212
2025	81.236
2026	80.515
2027	79.666
2028	78.732
2029	77.776
2030	76.835
2031	76.166
2032	75.467
2033	74.748
2034	74.01
2035	73.26
2036	72.739
2037	72.166
2038	71.554
2039	70.914
2040	70.257
2041	69.781
2042	69.253
2043	68.678
2044	68.064
2045	67.417
2046	66.919
2047	66.364
2048	65.761
2049	65.119
2050	64.447
2051	63.909
2052	63.324
2053	62.704
2054	62.059
2055	61.401
2056	60.877
2057	60.322
2058	59.749
2059	59.169
2060	58.594
2061	58.162
2062	57.711
2063	57.254
2064	56.802
2065	56.366
2066	56.067
2067	55.762
2068	55.455
2069	55.147
2070	54.845
2071	54.662
2072	54.46
2073	54.248
2074	54.036
2075	53.829
2076	53.728
2077	53.611
2078	53.48
2079	53.333
2080	53.176
2081	53.095
2082	52.987
2083	52.859
2084	52.718
2085	52.572
2086	52.512
2087	52.431
2088	52.335
2089	52.233
2090	52.132
2091	52.113
2092	52.078
2093	52.035
2094	51.988
2095	51.945
2096	51.994
2097	52.03
2098	52.057
2099	52.082
2100	52.109