Year	Percent
1950	0.521
1951	1.163
1952	2.399
1953	3.465
1954	4.266
1955	4.762
1956	4.916
1957	4.737
1958	4.26
1959	3.548
1960	2.693
1961	1.824
1962	1.121
1963	0.713
1964	0.583
1965	0.595
1966	0.602
1967	0.578
1968	0.575
1969	0.576
1970	0.604
1971	0.653
1972	0.671
1973	0.572
1974	0.342
1975	0.048
1976	-0.24
1977	-0.4
1978	-0.321
1979	-0.006
1980	0.487
1981	1.029
1982	1.331
1983	1.201
1984	0.659
1985	-0.153
1986	-0.956
1987	-1.265
1988	-0.652
1989	0.868
1990	2.858
1991	4.671
1992	5.754
1993	5.847
1994	5.121
1995	4.067
1996	3.094
1997	2.392
1998	2.037
1999	2.008
2000	2.14
2001	2.227
2002	2.169
2003	1.933
2004	1.53
2005	1.05
2006	0.591
2007	0.258
2008	0.115
2009	0.156
2010	0.295
2011	0.445
2012	0.553
2013	0.59
2014	0.556
2015	0.492
2016	0.44
2017	0.403
2018	0.373
2019	0.362
2020	0.35
2021	0.332
2022	0.321
2023	0.306
2024	0.293
2025	0.281
2026	0.261
2027	0.242
2028	0.225
2029	0.202
2030	0.171
2031	0.142
2032	0.111
2033	0.077
2034	0.044
2035	0.005
2036	-0.029
2037	-0.062
2038	-0.098
2039	-0.131
2040	-0.164
2041	-0.196
2042	-0.223
2043	-0.241
2044	-0.262
2045	-0.28
2046	-0.294
2047	-0.302
2048	-0.3
2049	-0.298
2050	-0.292
2051	-0.283
2052	-0.275
2053	-0.26
2054	-0.243
2055	-0.23
2056	-0.211
2057	-0.193
2058	-0.182
2059	-0.168
2060	-0.151
2061	-0.141
2062	-0.134
2063	-0.121
2064	-0.118
2065	-0.113
2066	-0.11
2067	-0.113
2068	-0.115
2069	-0.117
2070	-0.122
2071	-0.13
2072	-0.139
2073	-0.145
2074	-0.154
2075	-0.167
2076	-0.175
2077	-0.183
2078	-0.195
2079	-0.205
2080	-0.213
2081	-0.225
2082	-0.235
2083	-0.244
2084	-0.252
2085	-0.252
2086	-0.256
2087	-0.267
2088	-0.268
2089	-0.264
2090	-0.268
2091	-0.27
2092	-0.27
2093	-0.266
2094	-0.262
2095	-0.261
2096	-0.263
2097	-0.263
2098	-0.254
2099	-0.25