Year	Percent
1950	2.468
1951	2.666
1952	2.972
1953	3.126
1954	3.177
1955	3.173
1956	3.159
1957	3.163
1958	3.206
1959	3.292
1960	3.392
1961	3.461
1962	3.446
1963	3.312
1964	3.076
1965	2.793
1966	2.525
1967	2.315
1968	2.18
1969	2.123
1970	2.108
1971	2.096
1972	2.073
1973	2.037
1974	1.989
1975	1.92
1976	1.844
1977	1.824
1978	1.909
1979	2.082
1980	2.312
1981	2.528
1982	2.577
1983	2.351
1984	1.881
1985	1.281
1986	0.702
1987	0.303
1988	0.2
1989	0.393
1990	0.743
1991	1.08
1992	1.312
1993	1.4
1994	1.338
1995	1.213
1996	1.107
1997	0.999
1998	0.852
1999	0.677
2000	0.477
2001	0.275
2002	0.148
2003	0.163
2004	0.317
2005	0.55
2006	0.784
2007	0.953
2008	1.017
2009	0.975
2010	0.88
2011	0.787
2012	0.723
2013	0.694
2014	0.702
2015	0.726
2016	0.743
2017	0.744
2018	0.727
2019	0.69
2020	0.643
2021	0.597
2022	0.556
2023	0.522
2024	0.495
2025	0.472
2026	0.448
2027	0.424
2028	0.401
2029	0.378
2030	0.357
2031	0.337
2032	0.315
2033	0.294
2034	0.272
2035	0.25
2036	0.228
2037	0.206
2038	0.184
2039	0.162
2040	0.14
2041	0.118
2042	0.097
2043	0.075
2044	0.053
2045	0.032
2046	0.01
2047	-0.01
2048	-0.028
2049	-0.045
2050	-0.059
2051	-0.074
2052	-0.088
2053	-0.102
2054	-0.117
2055	-0.131
2056	-0.146
2057	-0.159
2058	-0.172
2059	-0.185
2060	-0.199
2061	-0.211
2062	-0.223
2063	-0.235
2064	-0.246
2065	-0.257
2066	-0.267
2067	-0.277
2068	-0.287
2069	-0.296
2070	-0.305
2071	-0.313
2072	-0.322
2073	-0.33
2074	-0.339
2075	-0.347
2076	-0.356
2077	-0.364
2078	-0.372
2079	-0.379
2080	-0.386
2081	-0.392
2082	-0.398
2083	-0.406
2084	-0.414
2085	-0.422
2086	-0.431
2087	-0.439
2088	-0.447
2089	-0.455
2090	-0.462
2091	-0.469
2092	-0.476
2093	-0.483
2094	-0.49
2095	-0.495
2096	-0.501
2097	-0.506
2098	-0.511
2099	-0.514