Year	Percent
1950	1.083
1951	1.393
1952	1.934
1953	2.327
1954	2.591
1955	2.748
1956	2.81
1957	2.801
1958	2.735
1959	2.626
1960	2.486
1961	2.315
1962	2.116
1963	1.896
1964	1.662
1965	1.416
1966	1.172
1967	0.944
1968	0.75
1969	0.593
1970	0.464
1971	0.351
1972	0.239
1973	0.118
1974	-0.009
1975	-0.138
1976	-0.252
1977	-0.288
1978	-0.194
1979	0.026
1980	0.317
1981	0.609
1982	0.851
1983	1.01
1984	1.081
1985	1.114
1986	1.147
1987	1.146
1988	1.078
1989	0.948
1990	0.776
1991	0.597
1992	0.479
1993	0.479
1994	0.594
1995	0.768
1996	0.93
1997	1.031
1998	1.04
1999	0.958
2000	0.831
2001	0.703
2002	0.578
2003	0.449
2004	0.321
2005	0.194
2006	0.067
2007	-0.058
2008	-0.173
2009	-0.277
2010	-0.379
2011	-0.477
2012	-0.532
2013	-0.509
2014	-0.414
2015	-0.272
2016	-0.123
2017	-0.005
2018	0.055
2019	0.051
2020	0.014
2021	-0.021
2022	-0.048
2023	-0.068
2024	-0.079
2025	-0.089
2026	-0.103
2027	-0.118
2028	-0.132
2029	-0.143
2030	-0.152
2031	-0.163
2032	-0.176
2033	-0.19
2034	-0.206
2035	-0.224
2036	-0.244
2037	-0.265
2038	-0.29
2039	-0.319
2040	-0.35
2041	-0.381
2042	-0.413
2043	-0.444
2044	-0.477
2045	-0.508
2046	-0.538
2047	-0.566
2048	-0.588
2049	-0.606
2050	-0.62
2051	-0.629
2052	-0.639
2053	-0.645
2054	-0.647
2055	-0.648
2056	-0.643
2057	-0.638
2058	-0.629
2059	-0.618
2060	-0.608
2061	-0.594
2062	-0.579
2063	-0.561
2064	-0.543
2065	-0.524
2066	-0.503
2067	-0.483
2068	-0.465
2069	-0.449
2070	-0.432
2071	-0.415
2072	-0.4
2073	-0.388
2074	-0.376
2075	-0.367
2076	-0.358
2077	-0.35
2078	-0.348
2079	-0.347
2080	-0.346
2081	-0.347
2082	-0.349
2083	-0.353
2084	-0.36
2085	-0.366
2086	-0.373
2087	-0.381
2088	-0.384
2089	-0.387
2090	-0.388
2091	-0.389
2092	-0.393
2093	-0.398
2094	-0.406
2095	-0.414
2096	-0.423
2097	-0.435
2098	-0.446
2099	-0.455