DJF	MAM	JJA	SON
1905	987.929	987.494	980.818	984.3
1906	986.897	986.11	991.375	982.9
1907	986.555	984.331	988.41	985.3
1908	988.673	986.275	982.102	984.2
1909	988.909	986.435	983.659	984.6
1910	988.091	989.668	986.736	982.2
1911	993.649	993.453	984.653	983.8
1912	988.45	987.824	981.397	983.9
1913	986.95	990.769	988.271	983.4
1914	988.782	989.987	984.07	984.1
1915	988.086	991.997	986.031	986.5
1916	988.189	991.798	987.282	986.0
1917	985.97	991.725	992.167	982.2
1918	988.864	988.849	990.018	987.0
1919	987.84	985.769	985.399	985.5
1920	989.008	985.107	984.47	984.6
1921	989.792	987.427	992.007	981.2
1922	990.213	988.367	986.477	982.8
1923	985.669	991.189	986.397	986.2
1924	989.309	988.306	981.904	980.0
1925	994.483	985.929	983.617	985.4
1926	990.532	985.518	984.926	987.9
1927	983.998	991.624	989.021	985.1
1928	992.444	984.548	984.807	985.2
1929	989.871	987.846	985.539	984.6
1930	990.44	981.135	986.716	983.8
1931	989.141	983.602	985.927	982.8
1932	991.874	986.162	986.762	983.8
1933	987.158	986.488	984.035	983.0
1934	986.129	985.6	984.729	982.9
1935	989.013	988.493	983.772	984.7
1936	991.395	987.558	983.823	982.3
1937	986.502	990.22	981.933	982.0
1938	991.888	988.534	980.052	983.3
1939	989.697	985.785	985.39	983.8
1940	986.427	989.484	976.197	983.5
1941	990.764	988.062	984.358	984.2
1942	986.576	985.784	983.456	985.8
1943	985.526	987.588	984.428	983.9
1944	990.612	986.079	984.546	988.0
1945	990.83	986.95	985.927	984.2
1946	992.157	988.042	988.052	988.0
1947	988.361	985.136	988.93	980.4
1948	991.062	987.057	985.333	985.1
1949	992.76	985.44	987.173	980.4
1950	988.153	990.067	984.791	983.5
1951	990.563	990.868	985.499	988.2
1952	988.152	988.345	984.389	984.5
1953	989.138	986.156	982.642	987.7
1954	991.215	989.709	987.935	984.6
1955	991.097	988.548	988.48	984.1
1956	990.651	993.056	987.928	983.9
1957	991.566	987.388	987.198	987.0
1958	988.063	988.737	985.743	985.9
1959	989.167	988.363	986.261	984.2
1960	990.342	988.01	986.957	984.6
1961	984.966	988.084	985.487	986.0
1962	984.432	985.991	989.8	986.1
1963	990.069	984.469	989.078	986.5
1964	996.707	984.189	994.378	984.9
1965	991.507	986.323	989.043	984.9
1966	992.813	990.424	985.821	983.7
1967	990.41	987.745	985.242	985.4
1968	993.701	989.995	989.488	985.8
1969	987.886	986.646	985.513	986.1
1970	991.872	988.926	987.213	987.2
1971	993.684	989.973	989.54	985.6
1972	990.164	988.207	988.779	986.1
1973	987.111	987.391	987.197	983.9
1974	990.596	986.797	992.207	984.3
1975	990.955	989.29	991.439	985.1
1976	994.017	986.617	989.537	986.7
1977	986.271	989.142	988.454	985.1
1978	988.124	987.754	989.157	985.7
1979	992.417	985.753	983.326	985.0
1980	990.225	989.078	985.987	984.5
1981	987.361	987.934	989.651	984.1
1982	993.777	986.582	985.456	986.3
1983	990.722	989.021	988.673	983.3
1984	991.597	987.216	988.757	985.8
1985	988.555	990.532	985.577	984.4
1986	988.768	988.139	988.197	983.2
1987	988.829	986.604	987.141	983.5
1988	987.816	986.105	986.416	985.2
1989	988.401	986.827	984.81	983.2
1990	987.891	989.779	986.236	983.8
1991	991.555	987.892	987.788	986.0
1992	990.062	987.26	989.36	984.6
1993	986.931	986.242	982.965	983.6
1994	986.344	986.638	987.635	985.5
1995	987.047	983.714	994.894	983.7
1996	987.556	982.901	985.614	985.4
1997	988.096	980.655	985.782	986.5
1998	983.879	981.568	986.552	981.1
1999	984.662	981.949	984.901	981.2
2000	989.833	983.225	986.445	985.5
2001	986.041	984.487	983.855	982.8
2002	987.312	988.352	986.081	988.6
2003	986.713	982.779	984.085	985.7
2004	988.752	982.67	983.472	984.6
2005	988.067	982.483	985.436	983.1
2006	986.754	984.782	986.178	983.9
2007	983.503	986.629	992.493	988.9
2008	983.544	986.521	986.561	982.8
2009	988.89	987.377	988.525	984.9
2010	984.859	985.736	978.858	983.2
2011	984.142	986.175	988.028	984.1
2012	986.839		988.134	
2013	987.157		988.676