DJF	MAM	JJA	SON
1905	989.594	992.132	990.714	983.023
1906	987.414	990.59	993.922	984.165
1907	988.766	987.685	995.993	988.386
1908	989.045	989.899	989.99	986.665
1909	988.939	989.649	989.875	989.151
1910	988.904	991.659	993.372	986.1
1911	992.996	994.584	990.921	988.837
1912	989.068	987.476	992.659	983.215
1913	988.548	990.614	994.963	985.401
1914	987.499	988.829	993.25	984.7
1915	988.611	992.223	993.522	990.729
1916	986.663	992.447	997.508	989.719
1917	986.977	989.997	993.923	985.742
1918	989.012	992.037	995.01	991.796
1919	988.947	993.337	990.09	985.535
1920	989.401	991.809	993.711	987.161
1921	991.049	992.188	992.239	985.366
1922	990.476	987.908	990.182	985.767
1923	986.243	989.414	995.969	991.909
1924	988.115	990.979	992.868	984.985
1925	995.596	988.285	992.28	986.176
1926	989.05	992.453	995.684	989.696
1927	986.48	988.83	992.027	990.623
1928	991.053	991.887	993.157	986.884
1929	988.788	991.742	988.874	986.003
1930	990.999	987.751	993.692	989.98
1931	989.032	990.991	989.969	989.668
1932	990.725	991.702	993.348	984.595
1933	989.415	991.524	992.238	984.839
1934	987.856	989.663	989.744	985.04
1935	990.868	989.27	995.197	988.37
1936	990.359	989.456	994.472	983.821
1937	987.729	991.149	993.426	983.558
1938	990.577	993.241	989.68	985.319
1939	991.312	991.721	993.798	983.389
1940	988.261	989.954	991.242	985.21
1941	990.059	990.744	993.223	987.696
1942	987.635	990.266	991.429	994.432
1943	986.353	988.107	990.301	988.087
1944	991.959	988.677	991.615	994.292
1945	990.3	992.006	996.403	988.757
1946	990.517	992.795	994.091	989.31
1947	988.314	989.777	993.979	981.425
1948	989.324	990.28	994.28	987.239
1949	992.135	993.074	992.475	981.787
1950	987.06	994.905	993.621	987.412
1951	990.217	992.239	990.947	992.401
1952	985.318	990.99	996.272	985.861
1953	987.82	991.921	990.886	990.4
1954	989.783	990.868	993.974	989.547
1955	990.038	991.474	994.125	986.215
1956	988.91	996.334	994.225	986.548
1957	991.229	989.411	993.565	989.459
1958	985.762	993.094	993.658	986.343
1959	989.133	988.781	994.482	984.595
1960	990.217	988.652	989.94	986.801
1961	987.594	990.07	992.308	986.4
1962	986.387	992.423	992.256	989.937
1963	989.949	989.065	993.811	990.504
1964	994.737	990.27	994.379	987.858
1965	989.75	991.2	991.937	984.089
1966	990.833	990.335	991.493	986.17
1967	988.619	991.378	993.378	986.405
1968	990.305	990.188	987.396	986.305
1969	988.463	990.078	992.966	985.988
1970	990.28	990.776	992.566	990.857
1971	992.797	992.372	993.729	987.049
1972	989.548	993.505	995.496	986.889
1973	987.769	987.187	994.4	987.695
1974	989.739	991.187	995.479	986.798
1975	989.189	991.904	993.495	985.968
1976	992.012	988.597	987.713	988.635
1977	989.306	989.102	995.08	982.514
1978	988.771	995.072	989.409	985.831
1979	991.336	991.506	989.844	987.649
1980	989.506	994.543	991.835	987.462
1981	987.167	994.184	991.973	986.795
1982	992.23	988.572	993.067	987.932
1983	988.58	995.309	992.035	984.754
1984	991.266	992.015	995.995	988.708
1985	986.232	994.225	991.939	987.748
1986	988.981	994.757	986.769	984.531
1987	990.013	991.948	992.889	985.411
1988	988.205	992.779	993.355	989.712
1989	990.658	990.661	991.326	984.304
1990	988.652	992.894	988.034	984.424
1991	991.768	991.399	990.271	988.349
1992	993.013	995.747	994.945	987.419
1993	987.344	990.21	991.312	985.163
1994	989.571	992.969	994.156	989.034
1995	988.681	991.61	992.572	984.865
1996	988.524	989.167	990.361	984.907
1997	989.508	989.817	992.766	991.726
1998	985.323	992.706	988.628	982.408
1999	985.701	990.814	992.132	984.453
2000	989.4	993.866	997.143	990.078
2001	986.882	992.251	990.331	982.993
2002	989.538	993.299	993.061	994.791
2003	989.129	992.8	991.31	985.725
2004	988.296	990.474	990.485	987.374
2005	989.919	989.917	992.993	991.346
2006	987.554	989.81	996.671	987.496
2007	987.175	992.952	994.025	991.212
2008	984.379	992.852	993.428	985.509
2009	989.835	991.49	994.596	987.143
2010	986.533	988.369	988.112	986.14
2011		990.593	997.529	986.901