Year	Percent
1950	1.456
1951	1.519
1952	1.615
1953	1.656
1954	1.655
1955	1.623
1956	1.571
1957	1.507
1958	1.44
1959	1.372
1960	1.303
1961	1.229
1962	1.141
1963	1.035
1964	0.914
1965	0.785
1966	0.66
1967	0.562
1968	0.508
1969	0.497
1970	0.512
1971	0.532
1972	0.55
1973	0.565
1974	0.576
1975	0.587
1976	0.601
1977	0.619
1978	0.638
1979	0.657
1980	0.674
1981	0.686
1982	0.695
1983	0.704
1984	0.713
1985	0.721
1986	0.722
1987	0.698
1988	0.63
1989	0.521
1990	0.388
1991	0.255
1992	0.133
1993	0.032
1994	-0.048
1995	-0.114
1996	-0.176
1997	-0.235
1998	-0.288
1999	-0.335
2000	-0.377
2001	-0.412
2002	-0.424
2003	-0.398
2004	-0.335
2005	-0.251
2006	-0.163
2007	-0.084
2008	-0.02
2009	0.025
2010	0.06
2011	0.093
2012	0.116
2013	0.119
2014	0.101
2015	0.071
2016	0.035
2017	0
2018	-0.033
2019	-0.062
2020	-0.09
2021	-0.12
2022	-0.151
2023	-0.181
2024	-0.209
2025	-0.235
2026	-0.26
2027	-0.284
2028	-0.304
2029	-0.321
2030	-0.336
2031	-0.348
2032	-0.356
2033	-0.36
2034	-0.358
2035	-0.352
2036	-0.345
2037	-0.335
2038	-0.323
2039	-0.308
2040	-0.291
2041	-0.274
2042	-0.258
2043	-0.244
2044	-0.233
2045	-0.224
2046	-0.216
2047	-0.209
2048	-0.205
2049	-0.205
2050	-0.206
2051	-0.208
2052	-0.212
2053	-0.217
2054	-0.223
2055	-0.23
2056	-0.237
2057	-0.244
2058	-0.251
2059	-0.257
2060	-0.263
2061	-0.268
2062	-0.272
2063	-0.272
2064	-0.27
2065	-0.266
2066	-0.26
2067	-0.253
2068	-0.243
2069	-0.231
2070	-0.218
2071	-0.204
2072	-0.189
2073	-0.172
2074	-0.155
2075	-0.137
2076	-0.119
2077	-0.102
2078	-0.085
2079	-0.069
2080	-0.054
2081	-0.04
2082	-0.028
2083	-0.018
2084	-0.011
2085	-0.006
2086	-0.002
2087	0.001
2088	0
2089	-0.002
2090	-0.006
2091	-0.011
2092	-0.017
2093	-0.024
2094	-0.031
2095	-0.038
2096	-0.046
2097	-0.054
2098	-0.063
2099	-0.073