DJF	MAM	JJA	SON
1905	986.392	982.917	984.385	983.105
1906	985.124	985.046	985.266	980.259
1907	984.052	982.786	984.496	978.856
1908	986.92	982.149	982.21	981.47
1909	988.892	985.016	983.931	984.255
1910	986.448	984.016	987.637	983.467
1911	991.314	983.353	980.867	978.679
1912	988.444	983.31	984.708	981.399
1913	986.994	984.435	986.284	982.044
1914	988.186	979.342	984.081	978.968
1915	986.093	985.231	989.078	985.525
1916	987.295	985.6	987.317	980.451
1917	985.424	983.592	990.377	981.376
1918	986.498	983.666	982.966	976.287
1919	985.555	980.595	982.411	979.528
1920	986.461	981.94	983.95	980.14
1921	986.799	985.709	988.299	977.81
1922	989.402	983.274	986.211	981.366
1923	985.344	985.619	987.565	983.472
1924	988.793	983.148	986.279	981.801
1925	991.067	983.565	982.06	983.125
1926	986.698	982.846	985.169	983.68
1927	982.513	986.283	981.716	978.923
1928	989.228	982.573	981.119	983.794
1929	988.338	984.688	980.376	980.734
1930	988.185	981.729	985.878	978.667
1931	987.886	982.636	984.489	980.793
1932	990.708	983.963	984.813	980.918
1933	985.996	982.06	984.609	980.103
1934	985.278	983.586	981.989	979.437
1935	986.074	985.06	984.376	979.033
1936	990.64	984.119	981.836	980.066
1937	986.133	985.494	982.618	979.415
1938	991.087	984.637	982.012	980.87
1939	988.476	984.363	986.366	980.394
1940	983.841	983.677	976.536	977.343
1941	988.258	983.266	984.533	983.154
1942	986.63	982.368	984.847	982.207
1943	984.584	980.669	983.651	978.46
1944	988.894	979.642	985.466	980.752
1945	989.495	982.995	987.094	979.765
1946	989.211	980.794	985.637	982.321
1947	986.291	980.774	987.461	979.708
1948	989.693	982.023	984.603	984.571
1949	991.18	983.152	987.367	982.929
1950	986.07	986.101	984.502	979.066
1951	989.149	983.999	982.818	984.118
1952	986.974	984.892	984.124	982.207
1953	986.5	985.189	982.333	983.585
1954	988.204	984.247	985.621	980.105
1955	988.243	985.693	985.491	981.761
1956	989.162	985.697	986.206	980.563
1957	989.078	984.284	985.182	980.61
1958	985.776	985.052	985.93	983.278
1959	986.787	986.428	985.549	981.868
1960	987.519	983.703	984.468	981.404
1961	983.997	984.503	983.3	981.466
1962	984.25	983.792	988.663	982.651
1963	989.14	984.994	987.651	977.696
1964	993.366	982.939	993.502	981.438
1965	988.677	985.74	984.054	981.747
1966	991.416	985.586	983.313	980.802
1967	989.271	984.265	984.648	979.293
1968	992.106	985.227	985.024	984.374
1969	986.899	984.18	982.544	982.117
1970	989.96	988.052	982.792	982.542
1971	989.39	986.239	985.306	984.576
1972	988.073	986.083	986.183	981.58
1973	985.25	985.255	982.263	981.214
1974	988.869	985.254	990.633	979.587
1975	989.441	984.025	987.588	983.229
1976	991.127	982.818	985.961	980.663
1977	984.596	985.828	984.052	978.004
1978	986.611	985.927	983.879	979.728
1979	989.959	984.843	980.27	982.058
1980	986.934	986.052	983.108	983.136
1981	987.077	983.946	985.515	981.112
1982	989.817	981.275	981.711	982.045
1983	989.72	986.504	983.94	981.262
1984	989.674	986.79	983.798	980.96
1985	988.742	988.714	982.051	979.385
1986	987.635	987.279	985.339	979.662
1987	986.987	986.283	981.096	979.81
1988	986.731	985.852	988.666	986.403
1989	985.822	983.826	982.41	979.165
1990	988.019	987.62	982.66	979.584
1991	988.16	985.779	987.721	981.335
1992	987.838	984.922	987.922	979.721
1993	985.529	982.659	979.34	981.044
1994	982.854	984.989	983.209	984.394
1995	985.474	982.478	990.073	981.347
1996	986.209	982.504	988.248	983.596
1997	985.319	981.723	980.812	981.424
1998	983.893	981.682	984.161	980.386
1999	984.493	983.165	983.9	979.156
2000	989.082	981.303	982.905	983.415
2001	986.072	982.663	983.585	980.293
2002	985.92	986.536	983.826	985.229
2003	986.529	984.23	981.181	981.68
2004	987.797	981.765	982.232	981.342
2005	988.232	983.66	983.529	982.031
2006	985.459	982.714	982.647	980.975
2007	983.016	984.98	991.694	983.864
2008	985.292	987.605	982.129	980.828
2009	986.919	986.354	985.678	982.643
2010	986.488	982.058	977.582	981.032
2011		983.039	990.32	979.695