Year	Percent
1950	1.706
1951	1.92
1952	2.3
1953	2.595
1954	2.819
1955	2.985
1956	3.109
1957	3.202
1958	3.273
1959	3.328
1960	3.366
1961	3.381
1962	3.366
1963	3.317
1964	3.24
1965	3.147
1966	3.053
1967	2.974
1968	2.921
1969	2.892
1970	2.874
1971	2.852
1972	2.824
1973	2.79
1974	2.75
1975	2.711
1976	2.677
1977	2.639
1978	2.588
1979	2.529
1980	2.468
1981	2.413
1982	2.38
1983	2.38
1984	2.408
1985	2.438
1986	2.456
1987	2.486
1988	2.554
1989	2.649
1990	2.758
1991	2.847
1992	2.842
1993	2.686
1994	2.398
1995	2.05
1996	1.72
1997	1.45
1998	1.259
1999	1.15
2000	1.085
2001	1.029
2002	0.994
2003	1.003
2004	1.051
2005	1.122
2006	1.2
2007	1.289
2008	1.395
2009	1.511
2010	1.632
2011	1.745
2012	1.824
2013	1.849
2014	1.821
2015	1.764
2016	1.703
2017	1.641
2018	1.577
2019	1.513
2020	1.447
2021	1.378
2022	1.31
2023	1.247
2024	1.189
2025	1.135
2026	1.083
2027	1.035
2028	0.996
2029	0.964
2030	0.936
2031	0.911
2032	0.89
2033	0.873
2034	0.86
2035	0.851
2036	0.841
2037	0.832
2038	0.82
2039	0.806
2040	0.792
2041	0.776
2042	0.759
2043	0.737
2044	0.712
2045	0.684
2046	0.656
2047	0.627
2048	0.595
2049	0.562
2050	0.528
2051	0.494
2052	0.461
2053	0.429
2054	0.4
2055	0.372
2056	0.344
2057	0.319
2058	0.296
2059	0.275
2060	0.256
2061	0.238
2062	0.223
2063	0.21
2064	0.199
2065	0.19
2066	0.182
2067	0.174
2068	0.166
2069	0.158
2070	0.15
2071	0.142
2072	0.134
2073	0.125
2074	0.115
2075	0.105
2076	0.094
2077	0.083
2078	0.071
2079	0.059
2080	0.047
2081	0.035
2082	0.022
2083	0.01
2084	-0.002
2085	-0.015
2086	-0.027
2087	-0.039
2088	-0.051
2089	-0.062
2090	-0.074
2091	-0.085
2092	-0.096
2093	-0.106
2094	-0.116
2095	-0.125
2096	-0.133
2097	-0.14
2098	-0.147
2099	-0.153