DJF	MAM	JJA	SON
1905	989.438	987.057	984.2	984.886
1906	986.988	986.089	986.6	981.747
1907	985.267	985.387	986.7	983.94
1908	989.9	983.127	983.5	983.281
1909	989.851	986.235	983.9	983.675
1910	987.199	987.754	988.0	981.675
1911	995.007	989.421	983.3	984.11
1912	988.555	986.073	986.3	983.764
1913	986.757	988.41	986.1	983.418
1914	988.973	984.714	985.9	982.668
1915	986.631	990.314	988.3	986.117
1916	986.857	989.365	988.0	985.213
1917	986.061	988.933	988.0	981.677
1918	988.398	987.018	987.1	986.141
1919	987.332	984.64	984.6	983.973
1920	987.368	985.062	984.6	984.371
1921	987.705	988.024	988.7	981.238
1922	989.276	987.847	986.1	982.939
1923	988.143	989.457	986.9	985.566
1924	990.668	985.243	983.1	980.861
1925	993.215	985.855	983.2	984.924
1926	988.183	984.44	985.1	986.556
1927	984.414	987.538	987.0	983.694
1928	990.248	983.581	985.7	984.652
1929	990.861	986.471	985.5	983.013
1930	989.797	982.561	987.5	984.04
1931	989.554	982.43	986.3	982.265
1932	991.376	985.718	987.2	982.183
1933	987.535	986.388	984.8	981.666
1934	987.318	985.72	984.3	982.308
1935	988.864	986.833	985.3	982.845
1936	991.53	985.445	984.4	983.711
1937	987.319	988.288	984.0	980.758
1938	991.923	987.329	982.3	982.215
1939	990.539	984.767	987.1	982.234
1940	987.222	988.031	980.9	982.341
1941	991.381	986.664	985.5	983.626
1942	988.904	984.437	985.5	985.026
1943	986.531	987.825	985.1	982.869
1944	989.666	984.39	986.1	987.297
1945	991.468	986.828	986.8	983.768
1946	991.783	984.415	986.9	986.947
1947	987.7	982.905	987.8	980.495
1948	990.921	984.754	985.8	984.328
1949	991.478	983.033	987.6	979.93
1950	989.466	986.867	985.8	981.466
1951	991.145	987.9	986.4	987.846
1952	989.781	985.726	985.8	984.56
1953	989.451	985.975	985.1	986.768
1954	990.174	987.719	988.4	983.767
1955	989.099	986.99	989.5	984.058
1956	989.035	988.975	988.7	983.788
1957	992.224	987.836	988.7	987.135
1958	988.117	988.271	986.6	984.896
1959	989.74	990.422	987.5	983.461
1960	989.832	986.21	985.6	983.742
1961	985.47	987.456	985.7	984.1
1962	985.843	985.187	989.1	985.842
1963	989.928	986.098	989.1	984.486
1964	993.408	983.648	991.0	984.478
1965	989.842	985.504	987.2	983.489
1966	990.686	988.321	985.5	982.603
1967	990.718	987.077	984.9	984.102
1968	991.649	988.622	988.1	985.573
1969	988.076	985.948	986.4	984.675
1970	990.097	987.603	986.3	986.304
1971	992.112	986.95	987.1	985.051
1972	989.847	987.715	989.0	984.163
1973	986.248	987.343	987.0	982.819
1974	990.235	985.898	990.2	983.049
1975	990.245	987.962	989.5	983.501
1976	991.786	983.907	987.0	985.338
1977	986.419	987.95	987.2	984.103
1978	988.339	985.997	987.2	984.217
1979	991.829	984.74	984.5	983.925
1980	988.645	988.428	986.4	984.534
1981	987.721	986.447	988.0	983.632
1982	993.038	985.795	985.6	985.777
1983	990.075	987.955	987.6	983.162
1984	989.039	986.595	985.9	984.655
1985	989.133	990.261	985.5	983.212
1986	989.695	986.524	987.4	983.043
1987	988.383	985.936	986.8	982.939
1988	988.263	987.027	987.7	984.813
1989	988.457	986.443	983.5	982.33
1990	989.028	989.098	984.5	982.012
1991	991.126	987.169	987.1	985.723
1992	989.576	986.644	987.8	983.43
1993	988.011	985.497	983.7	982.733
1994	986.741	985.865	985.2	985.536
1995	987.593	982.308	992.3	983.894
1996	988.317	983.399	987.4	985.536
1997	988.607	982.156	986.9	985.41
1998	984.867	982.151	986.2	981.308
1999	985.438	983.13	986.7	981.12
2000	991.122	982.94	986.1	985.341
2001	987.06	984.754	985.0	981.883
2002	988.296	988.081	987.4	987.691
2003	989.976	984.548	984.7	986.029
2004	988.826	981.605	985.5	984.572
2005	988.072	983.704	987.0	982.894
2006	987.261	983.603	986.0	983.814
2007	983.728	985.875	989.3	989.804
2008	984.016	988.449	988.5	983.128
2009	989.237	985.988	988.9	984.837
2010	986.512	985.803	982.8	982.982
2011	984.924	986.04	987.7	984.156
2012	986.611			
2013	987.517