Year	Percent
1950	2.337
1951	2.46
1952	2.635
1953	2.691
1954	2.668
1955	2.607
1956	2.539
1957	2.493
1958	2.485
1959	2.518
1960	2.571
1961	2.606
1962	2.578
1963	2.452
1964	2.241
1965	1.96
1966	1.659
1967	1.451
1968	1.429
1969	1.569
1970	1.845
1971	2.136
1972	2.123
1973	1.559
1974	0.503
1975	-0.861
1976	-2.231
1977	-3.116
1978	-3.049
1979	-1.931
1980	-0.152
1981	1.661
1982	3.019
1983	3.677
1984	3.662
1985	3.331
1986	3.037
1987	2.897
1988	2.921
1989	3.101
1990	3.327
1991	3.487
1992	3.54
1993	3.482
1994	3.324
1995	3.123
1996	2.927
1997	2.735
1998	2.536
1999	2.336
2000	2.137
2001	1.946
2002	1.785
2003	1.668
2004	1.597
2005	1.549
2006	1.509
2007	1.484
2008	1.489
2009	1.519
2010	1.564
2011	1.61
2012	1.64
2013	1.644
2014	1.621
2015	1.584
2016	1.547
2017	1.51
2018	1.469
2019	1.425
2020	1.379
2021	1.332
2022	1.286
2023	1.243
2024	1.203
2025	1.165
2026	1.127
2027	1.093
2028	1.063
2029	1.037
2030	1.014
2031	0.992
2032	0.971
2033	0.951
2034	0.931
2035	0.912
2036	0.894
2037	0.874
2038	0.853
2039	0.829
2040	0.805
2041	0.781
2042	0.756
2043	0.729
2044	0.7
2045	0.67
2046	0.641
2047	0.612
2048	0.584
2049	0.557
2050	0.531
2051	0.506
2052	0.48
2053	0.456
2054	0.432
2055	0.409
2056	0.386
2057	0.363
2058	0.342
2059	0.32
2060	0.3
2061	0.28
2062	0.259
2063	0.239
2064	0.218
2065	0.198
2066	0.177
2067	0.157
2068	0.137
2069	0.116
2070	0.096
2071	0.076
2072	0.057
2073	0.039
2074	0.022
2075	0.006
2076	-0.009
2077	-0.024
2078	-0.037
2079	-0.05
2080	-0.061
2081	-0.073
2082	-0.083
2083	-0.092
2084	-0.099
2085	-0.106
2086	-0.113
2087	-0.119
2088	-0.127
2089	-0.135
2090	-0.143
2091	-0.152
2092	-0.16
2093	-0.169
2094	-0.176
2095	-0.184
2096	-0.193
2097	-0.202
2098	-0.211
2099	-0.222