DJF	MAM	JJA	SON
1905	990.348	989.994	989.787	981.34
1906	985.857	987.362	993.427	983.749
1907	988.24	983.803	996.596	988.423
1908	989.744	988.083	987.89	985.701
1909	989.215	986.467	988.423	990.279
1910	988.977	990.124	992.794	985.134
1911	993.709	993.294	989.083	989.988
1912	989.387	984.616	991.633	982.582
1913	989.003	986.385	996.316	985.824
1914	988.078	985.956	996.113	983.798
1915	988.363	987.299	992.073	991.808
1916	987.614	990.695	995.949	988.609
1917	986.014	990.649	992.944	987.611
1918	989.572	989.407	995.457	992.086
1919	988.879	991.663	988.264	984.057
1920	989.367	987.934	991.518	987.779
1921	990.329	989.44	989.331	988.335
1922	990.858	986.751	988.407	987.894
1923	986.374	986.44	996.538	993.954
1924	988.866	989.732	990.865	989.383
1925	997.808	983.791	990.665	986.764
1926	989.089	993.572	997.7	989.578
1927	984.468	987.011	991.152	991.026
1928	991.745	991.347	992.682	988.773
1929	988.044	990.838	987.673	984.645
1930	991.565	987.191	994.479	991.379
1931	988.689	992.185	988.917	992.632
1932	991.233	989.058	994.55	982.526
1933	989.046	989.397	991.921	983.49
1934	986.962	987.018	988.551	987.538
1935	990.845	986.108	995.56	989.971
1936	991.95	987.073	994.284	983.919
1937	987.853	989.593	992.866	984.246
1938	991.515	990.439	987.959	984.173
1939	991.919	991.371	994.791	983.24
1940	987.423	985.927	991.515	987.227
1941	991.57	989.786	993.86	989.054
1942	987.992	990.172	990.458	996.709
1943	986.495	983.948	989.559	987.734
1944	993.688	988.152	992.078	993.295
1945	991.345	987.625	996.122	989.245
1946	991.633	987.55	994.552	987.478
1947	988.922	988.05	993.475	981.61
1948	990.63	986.808	993.357	988.059
1949	993.987	990.037	989.915	983.002
1950	987.458	991.86	992.234	989.562
1951	992.119	988.279	990.31	992.438
1952	985.371	989.016	996.784	986.22
1953	988.61	987.693	989.809	987.045
1954	991.21	988.108	992.657	987.642
1955	990.982	987.379	992.747	987.587
1956	989.57	994.772	993.343	986.916
1957	994.156	986.049	993.459	987.833
1958	985.114	991.355	993.092	984.4
1959	989.646	985.947	995.691	983.633
1960	990.877	986.318	989.574	985.297
1961	987.379	985.735	992.77	982.277
1962	985.913	991.074	991.337	991.448
1963	991.108	984.996	995.403	992.639
1964	996.879	989.575	994.132	989.299
1965	990.016	990.41	992.237	980.077
1966	992.521	987.728	991.957	986.647
1967	989.454	988.494	994.706	985.136
1968	991.884	988.535	985.008	986.265
1969	989.386	987.364	993.157	982.315
1970	990.931	987.247	991.884	989.293
1971	993.635	991.738	991.844	986.438
1972	989.06	990.765	994.406	988.588
1973	986.885	984.611	992.819	988.696
1974	990.058	990.155	994.147	986.929
1975	989.338	989.07	992.374	984.93
1976	992.935	987.988	985.709	989.98
1977	989.284	986.545	995.895	981.757
1978	988.453	996.343	988.655	984.726
1979	992.961	992.497	988.616	987.946
1980	988.855	991.518	991.81	987.43
1981	986.67	992.247	991.414	986.251
1982	993.26	985.591	994.111	986.048
1983	989.219	993.619	989.806	984.752
1984	991.43	989.956	997.131	989.191
1985	984.741	992.1	991.501	988.357
1986	988.91	992.654	983.617	985.89
1987	989.195	990.555	994.669	986.492
1988	987.798	994.129	993.138	990.535
1989	991.201	989.726	989.589	986.794
1990	988.547	991.245	984.386	982.843
1991	992.076	988.74	990.794	990.27
1992	994.484	994.85	997.273	988.681
1993	986.337	987.443	990.043	985.993
1994	988.156	992.446	993.849	989.452
1995	988.273	989.192	989.785	986.119
1996	987.595	986.08	990.004	985.229
1997	990.146	989.033	991.758	992.286
1998	983.719	993.515	985.712	983.526
1999	985.027	990.013	991.092	986.829
2000	990.421	992.582	998.239	992.491
2001	986.387	990.087	990.379	984.005
2002	989.273	990.35	993.951	994.326
2003	989.272	993.057	989.722	984.541
2004	988.511	991.252	990.188	987.375
2005	991.218	986.135	993.463	993.964
2006	988.054	987.895	997.649	986.755
2007	986.712	992.376	992.031	987.63
2008	982.948	989.627	993.383	986.534
2009	990.079	988.367	993.565	984.538
2010	986.007	985.629	986.136	986.074
2011		987.549	998.048	985.646