Year	Percent
1950	4.374
1951	4.571
1952	4.893
1953	5.079
1954	5.141
1955	5.089
1956	4.934
1957	4.692
1958	4.374
1959	4.001
1960	3.601
1961	3.211
1962	2.869
1963	2.603
1964	2.413
1965	2.259
1966	2.109
1967	1.982
1968	1.898
1969	1.854
1970	1.844
1971	1.853
1972	1.829
1973	1.734
1974	1.576
1975	1.384
1976	1.208
1977	1.135
1978	1.229
1979	1.479
1980	1.816
1981	2.148
1982	2.379
1983	2.449
1984	2.37
1985	2.213
1986	2.065
1987	2.009
1988	2.095
1989	2.311
1990	2.59
1991	2.846
1992	2.993
1993	2.981
1994	2.826
1995	2.601
1996	2.39
1997	2.266
1998	2.268
1999	2.388
2000	2.557
2001	2.701
2002	2.789
2003	2.81
2004	2.767
2005	2.693
2006	2.619
2007	2.528
2008	2.403
2009	2.249
2010	2.076
2011	1.902
2012	1.754
2013	1.655
2014	1.601
2015	1.573
2016	1.544
2017	1.485
2018	1.376
2019	1.221
2020	1.043
2021	0.873
2022	0.738
2023	0.655
2024	0.624
2025	0.622
2026	0.622
2027	0.613
2028	0.592
2029	0.557
2030	0.516
2031	0.48
2032	0.446
2033	0.412
2034	0.377
2035	0.342
2036	0.307
2037	0.272
2038	0.238
2039	0.203
2040	0.169
2041	0.135
2042	0.103
2043	0.072
2044	0.042
2045	0.014
2046	-0.013
2047	-0.039
2048	-0.066
2049	-0.093
2050	-0.119
2051	-0.144
2052	-0.167
2053	-0.188
2054	-0.207
2055	-0.224
2056	-0.24
2057	-0.256
2058	-0.27
2059	-0.283
2060	-0.296
2061	-0.307
2062	-0.318
2063	-0.328
2064	-0.337
2065	-0.346
2066	-0.354
2067	-0.362
2068	-0.369
2069	-0.377
2070	-0.385
2071	-0.392
2072	-0.399
2073	-0.404
2074	-0.408
2075	-0.411
2076	-0.414
2077	-0.417
2078	-0.421
2079	-0.425
2080	-0.429
2081	-0.433
2082	-0.437
2083	-0.441
2084	-0.444
2085	-0.447
2086	-0.451
2087	-0.454
2088	-0.459
2089	-0.465
2090	-0.471
2091	-0.477
2092	-0.483
2093	-0.487
2094	-0.49
2095	-0.492
2096	-0.493
2097	-0.493
2098	-0.493
2099	-0.492