Year	Percent
1950	2.116
1951	2.063
1952	2.019
1953	2.081
1954	2.21
1955	2.373
1956	2.538
1957	2.679
1958	2.779
1959	2.831
1960	2.847
1961	2.853
1962	2.879
1963	2.948
1964	3.048
1965	3.171
1966	3.281
1967	3.277
1968	3.087
1969	2.74
1970	2.317
1971	1.922
1972	1.678
1973	1.664
1974	1.868
1975	2.18
1976	2.476
1977	2.69
1978	2.797
1979	2.8
1980	2.753
1981	2.709
1982	2.684
1983	2.674
1984	2.679
1985	2.687
1986	2.686
1987	2.661
1988	2.603
1989	2.517
1990	2.416
1991	2.316
1992	2.234
1993	2.182
1994	2.157
1995	2.143
1996	2.123
1997	2.091
1998	2.047
1999	1.99
2000	1.93
2001	1.872
2002	1.799
2003	1.694
2004	1.562
2005	1.417
2006	1.276
2007	1.169
2008	1.114
2009	1.111
2010	1.136
2011	1.162
2012	1.175
2013	1.167
2014	1.139
2015	1.1
2016	1.065
2017	1.038
2018	1.021
2019	1.014
2020	1.011
2021	1.007
2022	0.995
2023	0.972
2024	0.939
2025	0.899
2026	0.859
2027	0.821
2028	0.785
2029	0.752
2030	0.72
2031	0.687
2032	0.654
2033	0.621
2034	0.59
2035	0.558
2036	0.528
2037	0.498
2038	0.469
2039	0.441
2040	0.414
2041	0.388
2042	0.362
2043	0.335
2044	0.309
2045	0.282
2046	0.255
2047	0.23
2048	0.204
2049	0.18
2050	0.155
2051	0.131
2052	0.108
2053	0.084
2054	0.062
2055	0.039
2056	0.017
2057	-0.005
2058	-0.027
2059	-0.048
2060	-0.069
2061	-0.09
2062	-0.11
2063	-0.13
2064	-0.15
2065	-0.169
2066	-0.188
2067	-0.207
2068	-0.225
2069	-0.243
2070	-0.26
2071	-0.277
2072	-0.294
2073	-0.311
2074	-0.328
2075	-0.344
2076	-0.36
2077	-0.376
2078	-0.391
2079	-0.406
2080	-0.42
2081	-0.433
2082	-0.447
2083	-0.459
2084	-0.471
2085	-0.483
2086	-0.494
2087	-0.505
2088	-0.515
2089	-0.524
2090	-0.533
2091	-0.541
2092	-0.548
2093	-0.555
2094	-0.561
2095	-0.566
2096	-0.571
2097	-0.574
2098	-0.577
2099	-0.579