DJF	MAM	JJA	SON
1905	989.81	987.577	986.132	986.038
1906	987.999	990.609	991.502	983.426
1907	988.415	989.168	994.606	988.986
1908	989.496	985.259	987.782	984.772
1909	991.895	988.755	988.927	987.125
1910	989.23	987.21	991.455	987.091
1911	996.103	988.745	985.087	991.416
1912	991.584	990.577	987.472	988.011
1913	989.526	989.734	989.347	986.128
1914	990.397	988.908	986.986	986.523
1915	989.125	992.446	989.341	987.741
1916	989.005	987.449	988.593	984.641
1917	986.612	988.242	990.612	986.765
1918	989.418	991.56	988.01	990.105
1919	988.266	988.711	985.662	984.468
1920	990.962	988.707	991.246	984.404
1921	990.042	990.971	989.878	985.543
1922	992.381	989.619	986.678	984.489
1923	987.205	991.033	991.181	989.38
1924	991.289	989.299	987.61	984.971
1925	997.317	989.758	987.294	987.006
1926	989.169	989.739	990.536	987.031
1927	984.711	990.085	988.711	987.676
1928	992.767	988.501	990.309	987.859
1929	991.364	988.823	987.02	983.948
1930	992.646	989.245	989.522	991.997
1931	990.368	986.451	989.071	987.824
1932	994.089	990.139	990.206	983.529
1933	988.98	989.348	988.214	986.759
1934	987.206	988.136	987.202	983.48
1935	990.242	990.125	991.185	986.719
1936	994.619	989.694	989.475	986.971
1937	987.665	992.014	988.232	985.173
1938	994.223	990.461	985.599	984.514
1939	991.542	989.652	991.253	986.762
1940	987.447	990.701	987.419	986.725
1941	992.376	993.002	988.82	986.584
1942	988.699	986.325	990.752	987.459
1943	985.894	988.811	990.211	985.605
1944	992.194	987.651	987.102	989.322
1945	992.88	990.794	992.175	987.298
1946	993.22	988.334	992.212	986.813
1947	989.022	984.133	992.232	984.827
1948	992.615	990.516	990.649	987.467
1949	995.448	987.364	991.428	984.718
1950	988.42	988.813	988.64	983.149
1951	992.676	990.692	988.605	990.51
1952	989.113	989.643	990.572	984.033
1953	990.616	989.91	987.656	985.279
1954	993.162	987.749	990.685	988.115
1955	993.003	988.531	990.34	986.634
1956	992.631	987.181	992.614	985.422
1957	994.578	989.005	990.263	991.039
1958	987.823	990.231	990.103	982.71
1959	990.417	990.633	990.942	981.955
1960	992.203	987.666	988.458	984.548
1961	987.481	990.262	990.172	984.102
1962	986.954	989.502	991.131	988.367
1963	992.054	989.254	993.248	986.58
1964	998.713	987.736	996.253	987.927
1965	992.956	989.266	989.7	985.574
1966	995.001	989.578	987.568	985.686
1967	992.375	988.234	988.564	987.154
1968	995.706	989.017	987.871	989.079
1969	989.596	988.367	987.534	984.734
1970	993.264	991.074	989.853	987.659
1971	995.631	989.786	990.252	986.008
1972	992.211	990.59	992.198	985.012
1973	988.033	988.768	988.981	988.779
1974	991.702	986.226	993.153	985.151
1975	992.413	989.2	990.918	984.516
1976	996.442	988.009	986.858	985.911
1977	989.145	990.752	991.078	983.929
1978	990.251	989.003	988.593	985.221
1979	994.641	987.978	985.197	986.176
1980	991.512	988.799	987.853	989.027
1981	990.197	988.622	990.825	985.56
1982	996.454	984.954	986.022	984.168
1983	993.461	989.719	988.318	985.345
1984	993.184	989.01	990.305	983.716
1985	990.333	990.531	988.213	984.164
1986	991.979	990.654	986.355	983.679
1987	990.676	990.306	987.81	984.71
1988	989.661	989.507	992.386	988.191
1989	990.665	985.622	987.077	982.541
1990	991.24	992.58	987.005	983.986
1991	993.999	990.903	990.553	987.849
1992	993.275	989.045	992.043	986.075
1993	988.081	987.512	985.023	984.44
1994	987.972	988.681	989.299	988.516
1995	988.433	987.951	990.838	984.509
1996	989.621	985.993	992.83	986.63
1997	990.567	985.982	986.044	988.231
1998	985.793	984.224	986.034	983.581
1999	986.054	986.609	987.745	984.092
2000	992.864	985.927	989.921	986.986
2001	987.611	987.62	986.46	982.101
2002	990.696	991.547	988.218	988.618
2003	990.749	986.092	988.494	985.132
2004	990.163	985.681	986.982	985.422
2005	991.669	989.017	989.507	985.906
2006	989.785	985.635	989.398	986.126
2007	985.36	989.257	991.188	989.228
2008	984.787	992.001	988.519	982.547
2009	991.585	988.313	990.244	985.286
2010	986.886	984.568	984.008	983.675
2011		986.997	993.993	989.259