DJF	MAM	JJA	SON
1905	986.0	981.106	983.097	984.9
1906	985.5	981.784	982.67	981.6
1907	982.5	983.067	982.397	981.4
1908	988.3	981.604	983.095	983.7
1909	988.9	983.207	986.817	983.5
1910	989.2	982.407	990.619	982.4
1911	994.8	982.263	977.961	981.7
1912	988.2	981.937	983.9	984.0
1913	985.3	984.726	984.69	982.5
1914	986.5	981.058	982.63	981.5
1915	987.9	985.112	987.781	986.8
1916	988.8	984.142	985.967	984.2
1917	986.5	981.982	985.478	983.3
1918	989.4	983.088	984.783	983.8
1919	988.6	982.032	984.527	984.2
1920	990.4	981.707	985.641	982.2
1921	988.0	982.857	988.233	978.4
1922	990.5	981.743	985.652	983.0
1923	985.3	984.676	988.706	983.7
1924	986.4	981.596	984.303	982.0
1925	992.0	984.249	981.507	983.7
1926	990.6	981.959	984.429	985.3
1927	982.7	985.082	983.416	981.9
1928	992.3	980.721	983.08	984.2
1929	990.1	982.565	982.891	982.8
1930	990.4	980.506	985.571	981.0
1931	989.3	984.181	984.258	980.9
1932	990.7	981.137	985.705	981.2
1933	986.0	980.483	983.051	982.0
1934	985.1	984.392	983.304	980.1
1935	986.8	982.001	981.51	981.0
1936	991.9	984.021	982.856	982.2
1937	985.9	983.841	982.079	979.9
1938	991.9	985.556	977.891	980.4
1939	989.9	983.088	985.961	981.0
1940	984.9	983.653	977.02	979.6
1941	989.4	985.057	985.904	983.7
1942	985.6	981.654	985.203	985.8
1943	984.1	983.06	984.453	982.2
1944	989.7	981.342	986.151	986.2
1945	990.4	984.996	987.242	984.9
1946	990.0	985.396	987.57	987.4
1947	986.2	982.655	986.408	982.3
1948	990.4	984.552	983.851	984.7
1949	992.5	984.158	988.187	981.8
1950	987.3	986.165	985.816	980.2
1951	990.0	986.33	986.815	986.4
1952	987.0	984.685	985.505	983.8
1953	988.2	986.501	982.988	984.5
1954	989.6	987.007	984.896	979.4
1955	991.7	987.103	986.013	981.3
1956	991.5	987.692	987.359	982.2
1957	990.3	986.534	987.05	982.4
1958	987.4	986.053	986.295	982.8
1959	989.0	987.645	985.324	981.9
1960	987.9	984.553	984.64	981.5
1961	983.9	985.609	984.911	981.7
1962	983.0	984.052	987.131	983.0
1963	988.6	983.303	988.963	978.7
1964	992.5	983.065	993.828	981.8
1965	989.8	985.246	985.552	981.1
1966	990.8	985.18	982.831	980.9
1967	988.9	985.504	985.263	981.5
1968	991.3	983.277	985.649	984.8
1969	986.1	985.484	981.913	981.9
1970	990.8	985.882	984.779	984.9
1971	990.6	983.848	984.111	986.6
1972	987.8	985.833	986.172	981.7
1973	984.9	985.374	983.07	981.3
1974	988.3	983.338	990.886	980.5
1975	988.3	985.845	987.99	982.8
1976	991.7	983.859	983.961	979.3
1977	984.0	984.064	982.542	979.6
1978	985.9	984.41	985.445	979.3
1979	990.4	983.193	978.242	981.4
1980	988.4	986.4	983.3	982.0
1981	986.1	985.351	984.795	980.8
1982	990.6	984.363	981.074	981.0
1983	987.8	986.943	983.919	980.4
1984	992.0	985.705	983.372	981.9
1985	987.1	988.776	983.034	980.8
1986	986.2	986.467	985.88	979.8
1987	987.0	985.091	984.815	979.5
1988	985.8	984.308	987.487	985.3
1989	986.0	983.858	981.963	979.9
1990	987.4	985.602	983.869	980.2
1991	987.9	983.96	987.987	981.6
1992	987.1	985.408	987.426	979.7
1993	983.8	984.075	979.957	981.0
1994	983.8	983.56	982.791	982.6
1995	986.6	981.48	988.567	979.8
1996	986.2	983.284	988.431	983.8
1997	985.9	983.292	981.093	981.9
1998	983.2	983.489	985.794	978.6
1999	984.2	983.156	984.428	977.9
2000	989.2	983.119	984.086	982.2
2001	986.1	985.164	983.386	980.1
2002	986.4	986.812	984.7	984.1
2003	988.3	983.284	980.361	982.7
2004	988.0	980.597	983.201	981.7
2005	987.3	983.655	983.032	979.5
2006	984.4	983.057	982.09	980.7
2007	983.3	985.273	991.884	983.9
2008	984.4	987.597	983.805	981.7
2009	989.2	987.723	985.929	983.1
2010	987.5	983.542	980.143	979.9
2011		982.532	986.378	980.4
2012		982.756	985.046	
2013		981.843	984.742