DJF	MAM	JJA	SON
1905	985.96	988.688	989.041	979.504
1906	983.511	987.349	990.281	980.25
1907	983.066	982.44	993.038	984.917
1908	986.918	985.899	985.215	984.256
1909	987.641	984.408	984.353	987.555
1910	986.283	987.268	989.505	982.288
1911	992.198	990.571	986.378	987.491
1912	988.605	984.105	987.54	982.597
1913	986.584	986.033	993.284	984.349
1914	987.077	983.896	992.722	981.672
1915	985.487	987.057	988.274	989.362
1916	983.471	988.902	987.174	985.318
1917	981.642	986.299	985.85	984.268
1918	983.806	988.259	990.792	988.785
1919	983.995	991.185	984.349	982.378
1920	986.845	986.789	986.538	984.507
1921	987.604	986.621	986.247	985.641
1922	987.414	984.993	987.43	984.261
1923	983.458	984.374	993.993	991.323
1924	986.463	987.2	985.568	986.054
1925	994.422	983.058	985.899	985.188
1926	987.407	991.435	993.135	988.244
1927	981.027	985.888	987.624	988.723
1928	989.512	989.868	989.431	987.527
1929	987.197	988.271	987.797	983.865
1930	987.468	986.319	992.797	988.275
1931	986.402	989.684	984.911	991.411
1932	990.572	987.485	993.224	980.802
1933	986.884	988.236	986.905	981.289
1934	985.239	985.742	987.117	985.004
1935	988.926	985	990.868	986.736
1936	991.021	986.12	989.004	982.29
1937	987.129	986.513	991.109	982.373
1938	991.473	989.022	983.907	982.92
1939	988.513	989.132	991.765	982.273
1940	984.892	986.55	988.065	984.505
1941	989.625	988.082	988.989	988.309
1942	985.066	987.253	987.252	991.068
1943	981.995	982.015	983.735	985.824
1944	989.895	984.986	988.908	989.932
1945	990.13	986.234	990.585	987.817
1946	990.752	986.3	989.174	984.92
1947	987.253	986.857	988.989	980.678
1948	990.546	985.072	989.897	984.083
1949	993.741	989.414	987.212	978.954
1950	986.263	991.933	991.029	986.508
1951	991.142	985.92	986.253	990.332
1952	986.096	988.305	991.336	983.924
1953	988.255	988.062	985.091	982.857
1954	990.14	986.744	990.439	984.956
1955	989.908	987.833	988.725	984.37
1956	990.126	993.719	989.291	984.023
1957	993.516	984.546	992.304	985.448
1958	984.242	990.968	991.749	981.771
1959	988.502	984.485	995.544	981.579
1960	990.539	984.158	988.651	984.067
1961	987.143	985.707	993.394	980.788
1962	984.848	988.835	987.186	988.01
1963	989.919	983.764	993.486	990.891
1964	995.912	987.322	991.191	987.053
1965	989.56	987.571	992.155	977.826
1966	991.146	986.187	990.65	985.048
1967	988.399	988.775	993.182	982.517
1968	992.493	984.77	982.742	984.582
1969	986.791	987.254	991.281	980.69
1970	989.933	986.454	988.705	985.645
1971	993.411	989.041	989.253	984.442
1972	988.685	990.61	993.538	982.849
1973	985.729	983.171	990.236	985.31
1974	989.632	988.924	990.842	985.205
1975	987.92	988.188	990.32	982.379
1976	993.015	985.907	984.794	985.576
1977	987.516	984.217	993.886	980.351
1978	987.301	993.524	986.686	982.104
1979	990.843	990.117	987.792	984.431
1980	986.38	992.203	992.571	986.439
1981	984.731	991.185	986.995	984.903
1982	992.81	984.127	994.876	985.868
1983	988.27	993.033	988.334	983.891
1984	990.455	988.668	993.458	986.688
1985	984.299	991.932	989.283	986.118
1986	987.607	991.783	983.388	984.659
1987	988.043	989.483	993.052	983.744
1988	984.97	991.929	992.537	988.046
1989	987.587	988.538	988.128	984.845
1990	986.842	989.581	983.629	980.44
1991	989.646	987.638	990.162	987.085
1992	991.763	993.493	994.013	984.608
1993	984.668	986.05	989.13	983.849
1994	988.243	989.857	992.623	988.089
1995	986.569	986.408	990.628	984.001
1996	986.093	984.911	988.851	981.484
1997	988.438	985.761	990.647	989.414
1998	982.07	989.978	986.161	980.264
1999	984.129	985.956	989.911	983.586
2000	990.399	990.438	996.057	989.208
2001	983.403	989.044	988.653	979.644
2002	987.731	990.433	991.599	989.805
2003	986.571	990.994	985.885	982.074
2004	987.589	988.583	987	983.663
2005	991.288	984.302	991.106	990.871
2006	986.136	984.512	996.045	983.212
2007	983.643	990.931	991.099	984.038
2008	981.532	987.346	990.822	983.477
2009	988.907	986.364	991.317	981.55
2010	984.928	984.352	984.46	983.155
2011		985.794	995.24	982.075