Year	Percent
1950	10.843
1951	9.011
1952	6.431
1953	5.563
1954	5.642
1955	6.118
1956	6.565
1957	6.7
1958	6.386
1959	5.663
1960	4.752
1961	3.992
1962	3.771
1963	4.347
1964	5.553
1965	6.954
1966	8.053
1967	8.431
1968	7.963
1969	6.868
1970	5.597
1971	4.511
1972	3.707
1973	3.182
1974	2.927
1975	2.794
1976	2.671
1977	2.631
1978	2.76
1979	3.035
1980	3.394
1981	3.757
1982	4.024
1983	4.135
1984	4.11
1985	3.988
1986	3.852
1987	3.855
1988	4.097
1989	4.522
1990	5.018
1991	5.419
1992	5.495
1993	5.119
1994	4.379
1995	3.518
1996	2.758
1997	2.194
1998	1.855
1999	1.747
2000	1.75
2001	1.774
2002	1.92
2003	2.293
2004	2.857
2005	3.477
2006	4.026
2007	4.475
2008	4.829
2009	5.07
2010	5.241
2011	5.344
2012	5.249
2013	4.865
2014	4.247
2015	3.541
2016	2.88
2017	2.315
2018	1.859
2019	1.516
2020	1.229
2021	0.954
2022	0.739
2023	0.638
2024	0.647
2025	0.723
2026	0.82
2027	0.914
2028	0.994
2029	1.056
2030	1.112
2031	1.174
2032	1.236
2033	1.287
2034	1.324
2035	1.354
2036	1.377
2037	1.388
2038	1.379
2039	1.351
2040	1.311
2041	1.268
2042	1.226
2043	1.188
2044	1.155
2045	1.123
2046	1.09
2047	1.055
2048	1.02
2049	0.984
2050	0.949
2051	0.915
2052	0.881
2053	0.85
2054	0.82
2055	0.792
2056	0.764
2057	0.737
2058	0.712
2059	0.687
2060	0.663
2061	0.641
2062	0.619
2063	0.599
2064	0.58
2065	0.561
2066	0.544
2067	0.526
2068	0.509
2069	0.491
2070	0.473
2071	0.455
2072	0.438
2073	0.42
2074	0.402
2075	0.384
2076	0.366
2077	0.348
2078	0.33
2079	0.312
2080	0.295
2081	0.277
2082	0.259
2083	0.242
2084	0.224
2085	0.206
2086	0.189
2087	0.171
2088	0.154
2089	0.138
2090	0.122
2091	0.106
2092	0.09
2093	0.074
2094	0.059
2095	0.043
2096	0.028
2097	0.014
2098	-0.001
2099	-0.015