DJF	MAM	JJA	SON
1905	987.852	983.941	988.005	984.303
1906	986.574	986.552	991.929	983.259
1907	985.888	987.829	993.412	984.899
1908	988.206	987.182	984.955	982.313
1909	990.512	986.968	983.4	983.479
1910	988.642	987.208	984.112	982.333
1911	993.511	988.347	996.222	980.407
1912	989.986	986.156	984.583	983.766
1913	988.57	990.069	991.378	983.58
1914	989.778	986.161	987.126	978.503
1915	987.985	989.958	994.634	985.422
1916	989.446	988.541	985.685	984.466
1917	987.133	986.766	988.66	984.097
1918	988.323	988.749	985.826	982.303
1919	986.666	985.106	978.403	981.498
1920	988.509	983.7	988.95	981.912
1921	989.367	987.602	988.333	983.137
1922	992.518	986.255	986.081	983.096
1923	987.709	989.9	993.458	986.763
1924	990.757	987.997	984.151	983.633
1925	993.615	989.054	989.582	984.226
1926	989.026	987.387	988.661	984.157
1927	983.999	992.396	992.355	983.12
1928	992.092	984.147	991.748	986.789
1929	990.917	986.511	988.674	983.501
1930	990.23	982.002	992.009	984.864
1931	990.308	985.996	985.35	983.014
1932	993.146	983.344	987.857	981.634
1933	987.643	982.972	986.625	982.345
1934	987.427	987.182	986.088	982.468
1935	988.234	987.79	988.807	983.24
1936	993.265	988.333	988.398	983.23
1937	988.093	989.649	988.423	982.677
1938	993.74	989.441	988.412	981.758
1939	991.103	987.599	990.081	984.205
1940	985.04	988.3	985.923	983.092
1941	990.369	987.795	983.751	980.973
1942	988.538	984.668	986.419	984.257
1943	986.026	986.198	987.338	986.249
1944	991.517	986.074	981.38	982.263
1945	991.346	988.519	981.736	982.216
1946	991.116	990.096	984.613	983.346
1947	987.956	984.753	993.017	983.498
1948	991.606	989.969	988.971	987.445
1949	993.502	987.553	989.938	983.645
1950	987.435	988.879	990.077	983.76
1951	990.506	991.447	989.466	983.749
1952	988.523	987.327	993.842	987.583
1953	988.1	989.603	989.746	984.062
1954	989.911	990.43	993.608	983.008
1955	990.577	989.37	990.249	983.764
1956	991.475	993.176	995.272	985.601
1957	991.306	990.959	994.162	984.924
1958	986.87	990.372	992.398	984.077
1959	988.445	993.022	991.884	982.449
1960	989.085	988.561	988.201	985.24
1961	985.913	988.307	993.005	982.231
1962	985.715	985.656	990.308	986.515
1963	990.643	984.799	993.758	983.898
1964	996.441	986.454	995.288	984.179
1965	990.667	988.105	989.132	982.253
1966	993.181	988.671	988.658	983.715
1967	990.894	987.868	988.782	985.373
1968	993.361	989.625	992.727	987.131
1969	988.592	986.682	988.153	983.278
1970	992.671	988.091	987.647	985.069
1971	991.927	989.081	990.703	987.495
1972	989.771	991.269	993.89	982.661
1973	987.104	989.751	987.773	983.799
1974	991.493	987.696	993.957	986.051
1975	991.431	991.3	992.161	985.919
1976	994.1	987.995	989.13	988.318
1977	986.554	988.557	991.097	982.728
1978	988.629	988.065	989.865	982.765
1979	993.086	987.629	987.65	983.029
1980	988.996	989.929	992.258	984.729
1981	988.863	990.91	993.287	982.543
1982	991.96	987.138	988.961	983.277
1983	991.504	990.922	988.879	983.203
1984	992.184	989.821	991.104	984.911
1985	990.947	989.883	988.857	983.738
1986	989.411	989.212	988.039	985.578
1987	988.913	988.43	988.45	982.741
1988	988.623	987.124	988.681	987.528
1989	987.355	985.475	988.45	984.004
1990	990.105	990.45	990.595	983.437
1991	990.402	988.542	992.322	985.409
1992	990.285	988.034	992.189	986.366
1993	987.966	987.26	984.666	982.466
1994	985.126	988.25	991.66	986.533
1995	988.132	984.334	997.948	983.769
1996	988.351	986.513	990.987	985.171
1997	987.303	984.099	988.402	983.209
1998	986.171	983.439	985.688	981.932
1999	986.11	984.479	987.169	980.905
2000	991.36	984.173	992.495	985.265
2001	988.601	987.398	989.947	983.33
2002	987.55	990.928	992.746	985.826
2003	988.932	987.156	986.867	983.448
2004	989.537	984.526	988.437	983.486
2005	990.119	984.657	986.945	985.721
2006	986.72	987.608	990.847	980.227
2007	984.278	988.245	995.802	984.816
2008	986.817	991.697	989.727	982.534
2009	988.316	991.8	992.944	985.208
2010	988.499	986.904	982.053	981.249
2011		987.417	993.673	984.457