DJF	MAM	JJA	SON
1905	986.448	990.673	984.31	986.124
1906	985.671	988.336	989.257	983.102
1907	985.572	983.8	990.158	984.061
1908	986.578	986.146	987.666	982.762
1909	989.492	988.356	987.592	984.349
1910	987.471	989.042	992.335	984.164
1911	992.043	992.166	983.284	981.699
1912	988.72	989.723	984.861	984.265
1913	986.405	988.938	989.711	984.241
1914	988.053	989.368	986.567	981.164
1915	987.037	992.12	991.462	985.854
1916	989.758	989.921	987.84	984.29
1917	983.836	992.906	989.297	981.252
1918	987.699	991.315	981.105	984.125
1919	984.428	989.227	980.174	986.034
1920	989.062	987.265	988.042	983.077
1921	986.274	990.618	988.022	979.315
1922	989.207	989.869	984.341	982.829
1923	986.139	990.434	991.761	984.14
1924	986.462	985.875	985.017	981.408
1925	990.888	986.905	984.364	983.916
1926	987.971	987.925	985.086	986.51
1927	982.686	989.889	986.129	983.057
1928	991.397	988.171	986.677	986.119
1929	988.922	989.135	982.948	984.942
1930	990.841	985.583	988.516	983.349
1931	987.512	986.37	983.684	982.038
1932	989.704	988.858	985.146	983.56
1933	985.234	988.493	984.487	983.026
1934	985.237	986.431	982.57	981.02
1935	986.267	987.632	986	983.986
1936	993.355	989.201	982.854	982.604
1937	985.655	989.655	984.783	981.368
1938	993.346	988.405	981.967	981.6
1939	988.671	987.708	988.165	984.286
1940	985.278	987.406	984.041	981.392
1941	989.958	989.569	984.283	984.946
1942	988.173	985.853	987.721	983.995
1943	983.903	988.677	987.632	982.815
1944	989.147	987.096	983.522	986.725
1945	992.02	985.182	988.417	985.375
1946	990.959	988.316	988.122	988.321
1947	986.724	984.72	989.39	982.461
1948	991.511	987.2	985.919	986.242
1949	992.792	985.437	989.374	983.336
1950	988.065	989.667	989.257	982.616
1951	990.815	991.456	986.986	986.568
1952	989.126	990.169	987.731	984.443
1953	990.475	987.941	982.59	987.405
1954	991.186	987.03	988.426	982.643
1955	992.534	988.301	987.809	984.221
1956	992.918	989.264	991.321	984.329
1957	992.597	988.156	990.857	985.504
1958	987.241	989.846	988.35	985.613
1959	988.534	989.388	988.983	982.762
1960	988.605	987.268	984.99	984.209
1961	985.982	987.334	986.064	984.752
1962	986.57	987.349	988.861	985.424
1963	990.579	988.268	991.408	982.347
1964	994.133	986.801	997.664	983.754
1965	990.722	988.696	987.864	985.075
1966	993.04	990.809	986.187	981.014
1967	990.425	988.545	986.414	984.242
1968	991.929	989.909	989.971	988.161
1969	988.032	989.034	985.323	984.408
1970	992.222	991.012	985.096	985.005
1971	991.495	989.784	986.714	986.647
1972	989.297	988.64	990.202	985.932
1973	985.636	988.869	987.742	983.871
1974	988.801	988.27	991.834	982.276
1975	990.729	989.792	989.132	982.702
1976	991.186	986.716	985.277	981.195
1977	984.987	989.583	985.993	982.556
1978	987.305	988.104	986.549	983.225
1979	990.368	985.465	981.178	983.856
1980	988.179	989.918	984.555	983.011
1981	988.599	988.973	988.457	982.079
1982	991.163	985.58	981.484	983.485
1983	990.57	987.674	986.177	980.885
1984	988.805	986.634	985.34	983.572
1985	988.616	988.579	982.934	980.186
1986	988.74	987.713	983.862	980.635
1987	986.197	986.372	983.062	981.803
1988	987.055	988.017	986.389	985.02
1989	986.472	986.732	982.162	981.589
1990	989.771	990.67	984.424	983.239
1991	989.218	987.217	987.496	983.244
1992	988.013	986.86	986.878	981.045
1993	985.926	984.74	980.359	981.588
1994	985.39	985.833	984.039	982.791
1995	986.544	983.981	992.018	981.606
1996	987.386	983.571	986.658	985.07
1997	986.696	982.213	982.091	983.269
1998	984.512	982.115	984.204	980.592
1999	984.953	984.57	983.679	978.741
2000	991.669	982.833	985.581	981.948
2001	984.845	984.482	982.381	981.207
2002	988.17	989.564	985.107	985.573
2003	987.564	985.111	983.711	985.344
2004	987.244	983.486	982.626	983.314
2005	989.518	987.363	985.877	980.646
2006	987.105	984	984.199	983.76
2007	982.941	986.736	991.319	984.648
2008	984.666	987.374	983.941	982.66
2009	988.642	986.652	987.736	986.266
2010	987.62	984.29	978.374	983.066
2011		986.49	992.612	982.392