Year	Percent
1950	3.508
1951	3.296
1952	2.978
1953	2.843
1954	2.826
1955	2.877
1956	2.947
1957	2.995
1958	2.998
1959	2.945
1960	2.85
1961	2.745
1962	2.667
1963	2.649
1964	2.672
1965	2.731
1966	2.778
1967	2.654
1968	2.244
1969	1.579
1970	0.781
1971	0.007
1972	-0.577
1973	-0.845
1974	-0.778
1975	-0.514
1976	-0.223
1977	0.013
1978	0.15
1979	0.182
1980	0.165
1981	0.173
1982	0.271
1983	0.496
1984	0.837
1985	1.237
1986	1.614
1987	1.891
1988	2.023
1989	2.013
1990	1.93
1991	1.842
1992	1.754
1993	1.66
1994	1.566
1995	1.465
1996	1.359
1997	1.264
1998	1.197
1999	1.16
2000	1.137
2001	1.115
2002	1.096
2003	1.084
2004	1.075
2005	1.07
2006	1.067
2007	1.063
2008	1.059
2009	1.052
2010	1.043
2011	1.032
2012	1.02
2013	1
2014	0.974
2015	0.944
2016	0.913
2017	0.882
2018	0.852
2019	0.825
2020	0.797
2021	0.769
2022	0.74
2023	0.711
2024	0.682
2025	0.653
2026	0.623
2027	0.595
2028	0.566
2029	0.537
2030	0.508
2031	0.48
2032	0.452
2033	0.424
2034	0.396
2035	0.369
2036	0.342
2037	0.315
2038	0.29
2039	0.265
2040	0.241
2041	0.217
2042	0.195
2043	0.172
2044	0.149
2045	0.127
2046	0.106
2047	0.085
2048	0.066
2049	0.05
2050	0.034
2051	0.019
2052	0.004
2053	-0.009
2054	-0.023
2055	-0.037
2056	-0.05
2057	-0.063
2058	-0.075
2059	-0.087
2060	-0.099
2061	-0.111
2062	-0.122
2063	-0.133
2064	-0.144
2065	-0.156
2066	-0.167
2067	-0.177
2068	-0.188
2069	-0.2
2070	-0.211
2071	-0.222
2072	-0.233
2073	-0.244
2074	-0.253
2075	-0.262
2076	-0.272
2077	-0.281
2078	-0.289
2079	-0.299
2080	-0.308
2081	-0.316
2082	-0.324
2083	-0.331
2084	-0.338
2085	-0.343
2086	-0.349
2087	-0.354
2088	-0.358
2089	-0.363
2090	-0.367
2091	-0.37
2092	-0.374
2093	-0.377
2094	-0.38
2095	-0.383
2096	-0.387
2097	-0.389
2098	-0.392
2099	-0.396