Year	Percent
1950	1.628
1951	1.721
1952	1.921
1953	2.142
1954	2.369
1955	2.59
1956	2.793
1957	2.971
1958	3.117
1959	3.233
1960	3.327
1961	3.415
1962	3.515
1963	3.637
1964	3.778
1965	3.916
1966	4.032
1967	4.128
1968	4.207
1969	4.269
1970	4.318
1971	4.351
1972	4.352
1973	4.307
1974	4.226
1975	4.118
1976	4.003
1977	3.916
1978	3.878
1979	3.88
1980	3.898
1981	3.897
1982	3.835
1983	3.686
1984	3.461
1985	3.203
1986	2.956
1987	2.75
1988	2.598
1989	2.498
1990	2.428
1991	2.359
1992	2.269
1993	2.146
1994	1.994
1995	1.829
1996	1.674
1997	1.56
1998	1.51
1999	1.519
2000	1.553
2001	1.578
2002	1.586
2003	1.578
2004	1.549
2005	1.525
2006	1.511
2007	1.438
2008	1.246
2009	0.95
2010	0.588
2011	0.235
2012	0.02
2013	0.047
2014	0.314
2015	0.713
2016	1.108
2017	1.392
2018	1.508
2019	1.456
2020	1.32
2021	1.192
2022	1.093
2023	1.023
2024	0.984
2025	0.957
2026	0.922
2027	0.881
2028	0.843
2029	0.808
2030	0.774
2031	0.742
2032	0.712
2033	0.684
2034	0.658
2035	0.634
2036	0.61
2037	0.586
2038	0.563
2039	0.539
2040	0.515
2041	0.491
2042	0.466
2043	0.439
2044	0.409
2045	0.378
2046	0.347
2047	0.315
2048	0.282
2049	0.247
2050	0.212
2051	0.178
2052	0.143
2053	0.109
2054	0.076
2055	0.043
2056	0.012
2057	-0.018
2058	-0.045
2059	-0.07
2060	-0.093
2061	-0.114
2062	-0.133
2063	-0.149
2064	-0.161
2065	-0.171
2066	-0.18
2067	-0.187
2068	-0.193
2069	-0.197
2070	-0.201
2071	-0.204
2072	-0.206
2073	-0.207
2074	-0.207
2075	-0.207
2076	-0.207
2077	-0.207
2078	-0.209
2079	-0.212
2080	-0.216
2081	-0.22
2082	-0.225
2083	-0.231
2084	-0.237
2085	-0.244
2086	-0.252
2087	-0.26
2088	-0.268
2089	-0.277
2090	-0.286
2091	-0.294
2092	-0.303
2093	-0.311
2094	-0.318
2095	-0.325
2096	-0.331
2097	-0.336
2098	-0.34
2099	-0.343