Year	Percent
1950	2.898
1951	2.944
1952	3.024
1953	3.081
1954	3.118
1955	3.14
1956	3.152
1957	3.156
1958	3.156
1959	3.154
1960	3.149
1961	3.142
1962	3.131
1963	3.117
1964	3.101
1965	3.078
1966	3.05
1967	3.039
1968	3.06
1969	3.108
1970	3.165
1971	3.209
1972	3.21
1973	3.152
1974	3.041
1975	2.906
1976	2.775
1977	2.655
1978	2.548
1979	2.454
1980	2.367
1981	2.284
1982	2.207
1983	2.142
1984	2.088
1985	2.039
1986	1.991
1987	1.956
1988	1.946
1989	1.956
1990	1.976
1991	1.993
1992	1.986
1993	1.944
1994	1.866
1995	1.776
1996	1.692
1997	1.611
1998	1.528
1999	1.445
2000	1.36
2001	1.279
2002	1.233
2003	1.249
2004	1.323
2005	1.427
2006	1.527
2007	1.595
2008	1.614
2009	1.583
2010	1.528
2011	1.474
2012	1.426
2013	1.385
2014	1.351
2015	1.318
2016	1.283
2017	1.246
2018	1.21
2019	1.176
2020	1.142
2021	1.108
2022	1.074
2023	1.039
2024	1.005
2025	0.971
2026	0.937
2027	0.904
2028	0.871
2029	0.84
2030	0.809
2031	0.779
2032	0.749
2033	0.72
2034	0.691
2035	0.663
2036	0.636
2037	0.609
2038	0.582
2039	0.557
2040	0.531
2041	0.506
2042	0.482
2043	0.457
2044	0.433
2045	0.409
2046	0.385
2047	0.361
2048	0.337
2049	0.314
2050	0.291
2051	0.268
2052	0.245
2053	0.222
2054	0.198
2055	0.175
2056	0.151
2057	0.128
2058	0.105
2059	0.083
2060	0.061
2061	0.04
2062	0.018
2063	-0.003
2064	-0.023
2065	-0.043
2066	-0.063
2067	-0.082
2068	-0.1
2069	-0.118
2070	-0.135
2071	-0.151
2072	-0.167
2073	-0.181
2074	-0.195
2075	-0.208
2076	-0.22
2077	-0.233
2078	-0.245
2079	-0.258
2080	-0.271
2081	-0.283
2082	-0.295
2083	-0.307
2084	-0.319
2085	-0.33
2086	-0.341
2087	-0.352
2088	-0.361
2089	-0.37
2090	-0.378
2091	-0.386
2092	-0.393
2093	-0.4
2094	-0.406
2095	-0.412
2096	-0.417
2097	-0.422
2098	-0.426
2099	-0.428