DJF	MAM	JJA	SON
1905	987.315	991.085	992.623	982.539
1906	984.216	988.85	994.747	984.962
1907	985.555	987.484	997.733	987.23
1908	990.554	989.429	990.11	985.23
1909	992.532	989.805	990.372	987.892
1910	989.358	992.027	996.404	984.703
1911	997.59	994.114	990.691	987.356
1912	989.423	986.204	992.705	983.019
1913	988.243	989.362	997.655	984.355
1914	984.725	986.114	995.356	982.58
1915	985.502	990.727	995.17	991.205
1916	983.704	991.109	999.15	988.615
1917	984.319	989.909	995.681	989.297
1918	985.115	991.162	995.818	991.496
1919	985.985	991.841	989.498	982.634
1920	987.925	989.415	995.662	988.527
1921	989.92	991.004	992.404	986.495
1922	989.02	987.158	989.859	985.573
1923	984.902	988.129	997.239	990.494
1924	986.705	989.907	994.258	984.087
1925	996.739	987.116	992.515	984.762
1926	987.863	992.28	996.965	989.438
1927	982.755	990.931	991.76	987.69
1928	990.996	991.478	994.057	987.176
1929	989.678	991.094	988.701	984.511
1930	990.182	986.939	995.4	988.61
1931	986.934	991.648	990.043	986.129
1932	991.459	990.636	994.19	983.401
1933	988.629	990.659	993.229	984.417
1934	986.196	988.88	990.552	983.993
1935	991.801	987.495	997.775	987.417
1936	992.353	987.657	996.686	985.506
1937	988.203	990.689	993.8	983.586
1938	992.031	992.72	989.429	985.102
1939	989.991	991.186	995.198	981.054
1940	985.654	989.383	992.129	986.648
1941	989.407	990.124	994.927	985.725
1942	985.675	989.863	991.1	993.693
1943	982.397	986.542	989.152	981.831
1944	992.72	987.035	992.435	993.815
1945	990.892	991.083	998.989	985.305
1946	991.061	992.068	993.15	987.565
1947	986.355	989.361	994.623	980.676
1948	989.007	989.818	994.852	986.933
1949	995.24	992.391	992.551	981.933
1950	987.042	994.335	994.581	987.939
1951	992.292	991.131	989.91	993.096
1952	987.15	989.471	995.674	985.505
1953	989.39	989.967	990.756	988.543
1954	993.109	988.426	993.841	987.586
1955	993.924	990.37	992.589	987.346
1956	991.664	995.524	995.303	985.803
1957	994.093	987.05	993.01	988.991
1958	986.027	992.313	992.686	984.779
1959	991.697	987.659	995.837	983.617
1960	992.681	987.133	989.933	984.486
1961	986.791	988.397	991.611	981.542
1962	984.513	991.248	992.56	989.445
1963	989.786	986.938	995.01	989.949
1964	997.655	989.479	996.484	987.444
1965	990.783	990.707	992.916	982.208
1966	992.047	989.523	992.259	988.262
1967	988.158	990.746	996.218	984.922
1968	992.538	989.716	984.961	987.217
1969	986.399	988.882	993.812	985.289
1970	991.004	989.269	993.994	991.634
1971	994.184	992.518	994.707	987.873
1972	990.726	993.404	996.489	988.492
1973	986.913	986.127	995.67	990.237
1974	990.636	991.576	996.923	987.573
1975	989.52	990.776	994.12	987.978
1976	993.313	988.286	985.034	991.002
1977	987.601	987.481	996.315	981.5
1978	987.934	994.853	988.931	986.036
1979	993.414	992.026	988.661	987.409
1980	988.511	992.291	992.156	987.397
1981	986.555	992.409	992.018	987.007
1982	992.57	986.442	992.589	986.225
1983	989.445	994.775	991.084	985.267
1984	992.874	991.068	995.468	990.137
1985	985.085	993.303	991.311	988.474
1986	989.132	992.914	985.683	983.957
1987	989.314	991.92	994.159	984.809
1988	987.355	994.102	993.846	991.422
1989	989.384	990.963	991.327	985.465
1990	988.561	992.084	986.423	981.48
1991	991.968	989.599	988.281	989.628
1992	992.822	995.915	995.201	988.946
1993	985.914	988.942	990.24	984.31
1994	990.716	992.739	993.967	988.494
1995	989.213	989.73	991.03	986.283
1996	988.725	989.713	989.854	986.692
1997	990.987	987.906	992.062	990.071
1998	984.877	992.305	987.54	982.857
1999	984.882	991.176	991.755	984.594
2000	990.821	994.431	998.626	991.459
2001	986.461	992.272	989.038	983.975
2002	989.983	992.393	992.217	994.912
2003	990.041	993.146	991.788	986.675
2004	986.986	990.873	989.801	987.789
2005	992.456	989.054	993.7	993.568
2006	988.775	989.865	998.597	987.507
2007	987.467	993.509	994.467	992.575
2008	983.103	992.647	994.642	988.531
2009	994.905	990.841	995.804	988.154
2010	988.787	989.201	987.088	989.462
2011		991.239	999.4	988.495