Year	Percent
1950	2.465
1951	2.537
1952	2.674
1953	2.797
1954	2.905
1955	2.995
1956	3.067
1957	3.121
1958	3.158
1959	3.179
1960	3.189
1961	3.196
1962	3.207
1963	3.226
1964	3.253
1965	3.283
1966	3.309
1967	3.331
1968	3.354
1969	3.376
1970	3.399
1971	3.42
1972	3.433
1973	3.431
1974	3.418
1975	3.394
1976	3.367
1977	3.36
1978	3.388
1979	3.443
1980	3.509
1981	3.562
1982	3.576
1983	3.536
1984	3.449
1985	3.341
1986	3.237
1987	3.147
1988	3.071
1989	3.01
1990	2.952
1991	2.891
1992	2.84
1993	2.811
1994	2.8
1995	2.807
1996	2.819
1997	2.791
1998	2.689
1999	2.527
2000	2.291
2001	2.021
2002	1.897
2003	2.06
2004	2.463
2005	3.019
2006	3.53
2007	3.596
2008	2.947
2009	1.677
2010	0.094
2011	-1.443
2012	-2.594
2013	-3.074
2014	-2.788
2015	-2.053
2016	-1.257
2017	-0.398
2018	0.624
2019	1.72
2020	2.855
2021	3.917
2022	4.604
2023	4.709
2024	4.315
2025	3.694
2026	3.098
2027	2.621
2028	2.287
2029	2.098
2030	1.971
2031	1.825
2032	1.677
2033	1.561
2034	1.475
2035	1.409
2036	1.353
2037	1.303
2038	1.258
2039	1.215
2040	1.177
2041	1.144
2042	1.112
2043	1.075
2044	1.035
2045	0.993
2046	0.953
2047	0.916
2048	0.88
2049	0.847
2050	0.814
2051	0.783
2052	0.752
2053	0.724
2054	0.696
2055	0.671
2056	0.645
2057	0.621
2058	0.597
2059	0.573
2060	0.55
2061	0.527
2062	0.505
2063	0.482
2064	0.46
2065	0.437
2066	0.414
2067	0.392
2068	0.369
2069	0.346
2070	0.323
2071	0.3
2072	0.278
2073	0.255
2074	0.233
2075	0.21
2076	0.188
2077	0.166
2078	0.144
2079	0.122
2080	0.1
2081	0.078
2082	0.057
2083	0.036
2084	0.015
2085	-0.005
2086	-0.024
2087	-0.044
2088	-0.063
2089	-0.082
2090	-0.1
2091	-0.117
2092	-0.133
2093	-0.148
2094	-0.162
2095	-0.174
2096	-0.185
2097	-0.194
2098	-0.202
2099	-0.209