DJF	MAM	JJA	SON
1905	989.272	990.635	989.185	983.568
1906	987.681	986.588	993.469	986.555
1907	990.365	986.924	994.382	988.132
1908	990.262	989.789	988.804	986.409
1909	991.733	987.923	989.554	989.222
1910	989.733	991.61	990.76	986.308
1911	994.309	995.604	990.379	988.915
1912	989.899	985.649	991.806	983.585
1913	990.507	987.458	995.016	985.36
1914	988.579	989.019	993.474	984.634
1915	989.466	989.358	991.919	990.557
1916	988.468	990.807	996.01	987.889
1917	988.398	991.657	990.567	990.734
1918	989.756	991.036	995.319	990.619
1919	989.837	993.128	990.112	983.637
1920	991.296	990.93	992.568	988.235
1921	990.969	993.129	990.385	989.562
1922	991.803	987.151	989.378	988.763
1923	987.219	988.808	995.227	991.324
1924	989.624	990.62	991.118	989.234
1925	996.698	987.134	991.621	985.534
1926	990.23	992.883	995.452	988.044
1927	986.211	987.217	990.121	988.846
1928	992.464	991.981	992.677	988.243
1929	989.802	990.823	988.449	985.357
1930	991.498	987.495	990.766	988.654
1931	989.162	992.315	988.777	988.277
1932	990.967	991.051	994.217	983.651
1933	989.871	990.354	991.257	985.661
1934	987.882	989.284	990.023	988.358
1935	991.163	986.607	994.705	988.405
1936	991.028	988.031	993.19	986.991
1937	988.2	990.925	992.082	985.955
1938	991.714	992.895	987.904	985.26
1939	991.423	991.655	992.778	985.497
1940	988.154	987.087	991.582	989.599
1941	991.167	990.972	992.164	986.75
1942	989.28	991.51	992.19	994.121
1943	986.938	989.117	991.086	986.853
1944	993.351	990.177	991.784	992.198
1945	991.524	991.939	995.119	986.918
1946	991.724	993.579	994.049	986.436
1947	989.02	989.62	992.112	984.362
1948	990.024	989.973	993.401	988.365
1949	993.498	991.257	990.142	984.604
1950	987.954	991.773	990.572	989.739
1951	990.287	992.852	991.265	990.999
1952	985.522	988.518	996.837	986.645
1953	988.745	989.125	990.199	988.119
1954	991.712	989.957	991.902	988.496
1955	991.724	988.532	992.247	988.899
1956	989.927	995.79	993.996	987.03
1957	991.134	989.373	992.18	988.876
1958	985.319	991.879	992.801	986.451
1959	989.682	987.979	992.478	984.76
1960	991.259	988.357	989.793	985.614
1961	988.122	987.833	993.066	983.331
1962	986.558	993.046	989.891	990.494
1963	989.977	987.711	994.855	990.099
1964	996.356	990.488	993.583	989.402
1965	990.612	990.989	992.495	982.083
1966	991.96	988.646	991.126	987.676
1967	989.585	989.015	992.36	986.22
1968	991.101	989.94	986.227	986.605
1969	988.698	987.796	992.12	984.381
1970	991.553	987.342	993.181	990.677
1971	993.49	991.854	993.267	987.39
1972	990.254	991.192	995.577	989.384
1973	989.051	985.75	992.853	988.942
1974	990.589	990.205	993.807	987.256
1975	991.306	990.603	991.771	987.1
1976	992.785	987.954	986.049	991.063
1977	988.989	987.809	994.901	984.843
1978	989.306	995.576	989.907	987.48
1979	994.063	991.433	989.457	987.678
1980	989.973	990.672	990.86	986.856
1981	989.143	993.289	990.826	985.653
1982	992.351	988.642	994.396	984.974
1983	989.722	993.459	990.183	986.292
1984	991.56	989.923	996.601	989.466
1985	987.42	991.076	993.166	988.903
1986	989.122	992.122	986.369	985.824
1987	989.833	989.854	994.76	986.813
1988	989.354	992.411	995.038	989.611
1989	990.166	990.719	991.945	987.52
1990	988.889	991.95	986.845	983.456
1991	992.596	990.356	989.306	989.781
1992	993.734	994.479	995.786	989.126
1993	987.998	989.918	991.007	985.716
1994	990.331	993.147	994.741	987.776
1995	989.586	991.146	988.146	987.422
1996	990.215	988.771	989.862	988.093
1997	991.258	991.597	992.627	989.147
1998	987.088	994.072	986.491	986.01
1999	987.314	993.606	990.683	987.942
2000	991.183	995.68	997.165	991.847
2001	987.865	992.797	989.332	988.149
2002	989.678	990.436	993.136	992.148
2003	989.974	993.224	989.768	986.565
2004	989.054	991.961	991.32	987.523
2005	990.462	990.114	994.194	991.855
2006	987.669	991.539	995.024	987.424
2007	987.106	991.838	989.295	989.43
2008	984.035	991.852	993.747	990.287
2009	989.955	989.979	991.909	985.142
2010	987.917	988.831	989.609	990.848
2011	985.322	990.826	993.675	990.272
2012	988.982	993.941	987.531	986.356
2013	986.386	994.197	986.377	987.514