Year	Percent
1950	2.907
1951	2.826
1952	2.761
1953	2.846
1954	3
1955	3.148
1956	3.226
1957	3.186
1958	3.005
1959	2.694
1960	2.312
1961	1.958
1962	1.753
1963	1.789
1964	2.051
1965	2.429
1966	2.788
1967	3.042
1968	3.15
1969	3.122
1970	3.034
1971	2.962
1972	2.936
1973	2.962
1974	3.036
1975	3.126
1976	3.205
1977	3.271
1978	3.334
1979	3.39
1980	3.375
1981	3.281
1982	3.264
1983	3.454
1984	3.788
1985	4.281
1986	4.766
1987	4.636
1988	3.471
1989	1.441
1990	-1.151
1991	-3.833
1992	-5.637
1993	-5.489
1994	-3.042
1995	0.908
1996	4.777
1997	7.182
1998	7.601
1999	6.412
2000	4.627
2001	3.083
2002	2.063
2003	1.626
2004	1.762
2005	2.154
2006	2.472
2007	2.652
2008	2.729
2009	2.7
2010	2.629
2011	2.577
2012	2.545
2013	2.515
2014	2.487
2015	2.46
2016	2.429
2017	2.391
2018	2.344
2019	2.291
2020	2.234
2021	2.178
2022	2.128
2023	2.084
2024	2.047
2025	2.014
2026	1.981
2027	1.95
2028	1.922
2029	1.897
2030	1.873
2031	1.849
2032	1.825
2033	1.799
2034	1.771
2035	1.743
2036	1.714
2037	1.684
2038	1.65
2039	1.614
2040	1.577
2041	1.539
2042	1.5
2043	1.46
2044	1.42
2045	1.378
2046	1.338
2047	1.298
2048	1.26
2049	1.223
2050	1.187
2051	1.152
2052	1.118
2053	1.085
2054	1.055
2055	1.025
2056	0.995
2057	0.966
2058	0.937
2059	0.908
2060	0.88
2061	0.851
2062	0.823
2063	0.796
2064	0.769
2065	0.742
2066	0.715
2067	0.688
2068	0.661
2069	0.633
2070	0.605
2071	0.577
2072	0.55
2073	0.524
2074	0.498
2075	0.472
2076	0.447
2077	0.422
2078	0.398
2079	0.374
2080	0.351
2081	0.328
2082	0.305
2083	0.283
2084	0.261
2085	0.24
2086	0.219
2087	0.198
2088	0.178
2089	0.157
2090	0.137
2091	0.117
2092	0.098
2093	0.079
2094	0.061
2095	0.043
2096	0.025
2097	0.008
2098	-0.008
2099	-0.025