Year	Percent
1950	2.827
1951	2.584
1952	2.163
1953	1.857
1954	1.642
1955	1.496
1956	1.401
1957	1.341
1958	1.304
1959	1.281
1960	1.27
1961	1.275
1962	1.303
1963	1.358
1964	1.433
1965	1.527
1966	1.622
1967	1.66
1968	1.591
1969	1.427
1970	1.204
1971	0.983
1972	0.84
1973	0.832
1974	0.952
1975	1.14
1976	1.315
1977	1.408
1978	1.376
1979	1.223
1980	1.01
1981	0.8
1982	0.624
1983	0.488
1984	0.396
1985	0.331
1986	0.27
1987	0.2
1988	0.115
1989	0.018
1990	-0.089
1991	-0.19
1992	-0.233
1993	-0.175
1994	-0.02
1995	0.195
1996	0.41
1997	0.565
1998	0.616
1999	0.562
2000	0.454
2001	0.345
2002	0.258
2003	0.198
2004	0.166
2005	0.148
2006	0.126
2007	0.102
2008	0.088
2009	0.081
2010	0.079
2011	0.08
2012	0.081
2013	0.083
2014	0.086
2015	0.089
2016	0.093
2017	0.092
2018	0.085
2019	0.072
2020	0.054
2021	0.034
2022	0.014
2023	-0.007
2024	-0.029
2025	-0.052
2026	-0.077
2027	-0.102
2028	-0.127
2029	-0.154
2030	-0.18
2031	-0.207
2032	-0.233
2033	-0.257
2034	-0.281
2035	-0.303
2036	-0.324
2037	-0.344
2038	-0.361
2039	-0.375
2040	-0.388
2041	-0.399
2042	-0.409
2043	-0.418
2044	-0.425
2045	-0.431
2046	-0.437
2047	-0.442
2048	-0.447
2049	-0.453
2050	-0.458
2051	-0.463
2052	-0.47
2053	-0.478
2054	-0.487
2055	-0.497
2056	-0.508
2057	-0.518
2058	-0.529
2059	-0.541
2060	-0.553
2061	-0.564
2062	-0.576
2063	-0.587
2064	-0.598
2065	-0.609
2066	-0.618
2067	-0.627
2068	-0.634
2069	-0.64
2070	-0.644
2071	-0.647
2072	-0.648
2073	-0.647
2074	-0.645
2075	-0.64
2076	-0.635
2077	-0.628
2078	-0.62
2079	-0.612
2080	-0.602
2081	-0.592
2082	-0.581
2083	-0.569
2084	-0.558
2085	-0.545
2086	-0.533
2087	-0.521
2088	-0.511
2089	-0.501
2090	-0.492
2091	-0.485
2092	-0.477
2093	-0.47
2094	-0.464
2095	-0.458
2096	-0.453
2097	-0.45
2098	-0.448
2099	-0.448