Year	Percent
1950	2.194
1951	2.149
1952	2.05
1953	1.937
1954	1.829
1955	1.743
1956	1.694
1957	1.693
1958	1.748
1959	1.854
1960	1.989
1961	2.12
1962	2.204
1963	2.21
1964	2.143
1965	2.034
1966	1.922
1967	1.833
1968	1.781
1969	1.762
1970	1.76
1971	1.749
1972	1.696
1973	1.582
1974	1.41
1975	1.214
1976	1.029
1977	0.868
1978	0.735
1979	0.633
1980	0.544
1981	0.458
1982	0.416
1983	0.458
1984	0.58
1985	0.748
1986	0.917
1987	1.029
1988	1.045
1989	0.966
1990	0.837
1991	0.71
1992	0.608
1993	0.543
1994	0.516
1995	0.506
1996	0.492
1997	0.468
1998	0.434
1999	0.39
2000	0.343
2001	0.301
2002	0.26
2003	0.218
2004	0.175
2005	0.13
2006	0.086
2007	0.06
2008	0.066
2009	0.103
2010	0.159
2011	0.216
2012	0.253
2013	0.252
2014	0.215
2015	0.158
2016	0.101
2017	0.057
2018	0.032
2019	0.028
2020	0.033
2021	0.037
2022	0.036
2023	0.031
2024	0.021
2025	0.009
2026	-0.003
2027	-0.017
2028	-0.035
2029	-0.059
2030	-0.085
2031	-0.113
2032	-0.139
2033	-0.163
2034	-0.184
2035	-0.205
2036	-0.225
2037	-0.246
2038	-0.265
2039	-0.284
2040	-0.303
2041	-0.321
2042	-0.34
2043	-0.359
2044	-0.379
2045	-0.4
2046	-0.42
2047	-0.441
2048	-0.462
2049	-0.485
2050	-0.507
2051	-0.53
2052	-0.551
2053	-0.572
2054	-0.591
2055	-0.609
2056	-0.626
2057	-0.642
2058	-0.657
2059	-0.672
2060	-0.685
2061	-0.697
2062	-0.705
2063	-0.707
2064	-0.703
2065	-0.696
2066	-0.687
2067	-0.676
2068	-0.665
2069	-0.653
2070	-0.64
2071	-0.626
2072	-0.612
2073	-0.597
2074	-0.581
2075	-0.565
2076	-0.55
2077	-0.537
2078	-0.53
2079	-0.528
2080	-0.529
2081	-0.53
2082	-0.532
2083	-0.534
2084	-0.535
2085	-0.537
2086	-0.539
2087	-0.539
2088	-0.536
2089	-0.529
2090	-0.519
2091	-0.509
2092	-0.499
2093	-0.491
2094	-0.485
2095	-0.479
2096	-0.473
2097	-0.467
2098	-0.459
2099	-0.449