DJF	MAM	JJA	SON
1905	987.743	985.061	982.841	986.1
1906	985.745	985.817	984.606	983.1
1907	984.676	984.662	987.582	984.6
1908	989.542	983.894	980.756	984.8
1909	989.036	985.241	983.584	984.2
1910	985.366	985.767	988.984	982.5
1911	993.857	989.039	983.347	982.5
1912	986.465	984.546	983.873	984.0
1913	984.874	989.201	985.522	983.5
1914	988.693	987.882	983.019	982.5
1915	984.741	989.055	989.67	987.1
1916	986.86	989.626	985.414	984.6
1917	984.543	986.466	986.052	982.7
1918	987.791	985.453	985.097	985.7
1919	985.39	983.07	983.333	985.4
1920	985.563	984.301	985.47	983.3
1921	985.5	986.571	984.551	979.0
1922	986.885	987.108	986.595	982.6
1923	987.306	988.247	988.751	984.5
1924	988.862	985.893	980.553	980.5
1925	991.79	985.784	983.551	984.1
1926	986.899	984.579	986.657	987.2
1927	983.031	987.024	988.596	983.8
1928	990.299	985.736	985.242	985.1
1929	989.658	986.579	984.453	984.7
1930	989.742	983.562	989.389	982.9
1931	986.741	982.208	984.132	982.4
1932	988.526	986.193	987.246	983.1
1933	984.979	987.301	982.457	983.2
1934	985.113	985.427	982.876	981.1
1935	987.725	989.005	983.913	983.6
1936	990.09	987.204	983.813	982.8
1937	985.597	988.383	982.777	980.6
1938	992.31	988.181	980.389	982.6
1939	988.584	985.444	987.741	983.1
1940	986.67	988.856	978.578	982.0
1941	990.818	986.323	985.672	983.8
1942	989.717	984.612	983.546	985.8
1943	985.611	985.506	985.77	983.4
1944	989.358	987.12	982.098	988.8
1945	992.304	987.023	986.967	985.4
1946	992.021	986.435	991.79	988.4
1947	987.643	984.175	988.853	981.9
1948	991.594	986.828	985.452	985.2
1949	991.433	984.765	987.707	980.6
1950	990.628	987.872	985.989	982.4
1951	991.12	991.371	987.585	987.8
1952	989.145	988.496	986.776	984.7
1953	990.166	987.953	985.776	986.8
1954	992.12	988.193	985.741	982.3
1955	991.038	987.482	988.555	983.0
1956	989.407	991.353	989.541	983.9
1957	992.778	989.06	988.235	985.9
1958	988.801	988.834	988.65	984.8
1959	990.357	990.898	987.155	982.9
1960	989.6	988.088	986.145	983.8
1961	984.828	988.211	986.525	984.4
1962	984.96	987.156	986.498	985.1
1963	991.142	988.192	990.883	983.5
1964	993.213	985.35	994.834	984.3
1965	991.649	988.848	986.965	984.9
1966	992.043	990.27	984.785	982.9
1967	991.483	987.521	987.395	984.2
1968	992.237	990.069	989.831	987.5
1969	988.189	988.535	982.517	985.1
1970	990.933	990.522	986.374	986.8
1971	991.454	990.608	987.234	987.0
1972	989.442	989.092	991.904	984.1
1973	985.74	988.172	988.681	983.5
1974	988.461	988.45	992.75	983.7
1975	990.367	988.91	988.935	984.0
1976	991.045	986.517	984.535	981.1
1977	984.742	989.678	987.284	982.4
1978	986.61	987.021	988.707	982.6
1979	991.11	986.826	981.438	983.1
1980	987.432	990.274	984.483	983.0
1981	988.117	987.795	989.13	982.7
1982	991.98	986.181	985.491	983.6
1983	989.508	988.462	987.708	981.4
1984	986.772	987.456	986.538	984.6
1985	988.044	988.829	984.237	981.6
1986	989.47	988.426	984.966	981.1
1987	986.583	986.986	984.439	981.4
1988	988.214	984.949	983.828	985.4
1989	988.268	986.311	982.986	981.3
1990	988.398	987.042	984.195	981.7
1991	990.829	986.464	988.212	983.1
1992	987.491	987.328	988.823	982.1
1993	986.285	985.91	980.917	982.1
1994	986.115	985.422	983.445	983.6
1995	985.717	984.362	992.439	980.2
1996	988.034	983.923	984.85	984.5
1997	988.553	983.65	983.484	983.8
1998	984.214	983.074	985.627	978.8
1999	984.944	983.207	982.268	978.0
2000	990.535	984.315	986.742	982.6
2001	985.783	984.898	982.572	980.5
2002	986.606	987.688	985.311	986.6
2003	988.05	984.992	982.514	984.2
2004	986.551	983.25	982.794	983.1
2005	988.888	984.904	984.392	980.3
2006	987.283	986.178	981.748	982.6
2007	982.911	985.125	989.19	984.9
2008	983.527	988.102	984.137	982.3
2009	987.992	986.971	988.792	984.6
2010	987.659	985.754	980.441	982.5
2011	983.734	986.505	987.441	982.5
2012	987.336	983.781		
2013	987.061	984.347