Year	Percent
1950	4.357
1951	3.84
1952	2.909
1953	2.162
1954	1.57
1955	1.147
1956	0.882
1957	0.763
1958	0.814
1959	1.002
1960	1.283
1961	1.605
1962	1.879
1963	2.04
1964	2.089
1965	2.085
1966	2.078
1967	2.049
1968	1.973
1969	1.854
1970	1.699
1971	1.525
1972	1.358
1973	1.215
1974	1.089
1975	0.983
1976	0.876
1977	0.714
1978	0.446
1979	0.08
1980	-0.315
1981	-0.681
1982	-0.986
1983	-1.203
1984	-1.313
1985	-1.373
1986	-1.408
1987	-1.289
1988	-0.906
1989	-0.271
1990	0.508
1991	1.281
1992	1.917
1993	2.349
1994	2.565
1995	2.654
1996	2.723
1997	2.717
1998	2.565
1999	2.284
2000	1.933
2001	1.579
2002	1.297
2003	1.141
2004	1.11
2005	1.145
2006	1.178
2007	1.191
2008	1.189
2009	1.167
2010	1.129
2011	1.105
2012	1.088
2013	1.072
2014	1.061
2015	1.045
2016	1.035
2017	1.023
2018	1.005
2019	0.99
2020	0.971
2021	0.958
2022	0.94
2023	0.916
2024	0.896
2025	0.871
2026	0.845
2027	0.819
2028	0.794
2029	0.761
2030	0.733
2031	0.708
2032	0.674
2033	0.642
2034	0.613
2035	0.586
2036	0.553
2037	0.52
2038	0.492
2039	0.466
2040	0.434
2041	0.401
2042	0.372
2043	0.347
2044	0.327
2045	0.301
2046	0.272
2047	0.25
2048	0.228
2049	0.209
2050	0.191
2051	0.171
2052	0.152
2053	0.137
2054	0.125
2055	0.11
2056	0.097
2057	0.091
2058	0.08
2059	0.072
2060	0.067
2061	0.06
2062	0.057
2063	0.052
2064	0.046
2065	0.044
2066	0.042
2067	0.041
2068	0.035
2069	0.028
2070	0.02
2071	0.012
2072	0.007
2073	-0.005
2074	-0.017
2075	-0.022
2076	-0.035
2077	-0.048
2078	-0.055
2079	-0.069
2080	-0.082
2081	-0.097
2082	-0.105
2083	-0.112
2084	-0.125
2085	-0.132
2086	-0.139
2087	-0.149
2088	-0.155
2089	-0.158
2090	-0.166
2091	-0.171
2092	-0.178
2093	-0.185
2094	-0.187
2095	-0.19
2096	-0.19
2097	-0.192
2098	-0.197
2099	-0.197