DJF	MAM	JJA	SON
1905	988.87	986.853	983.518	984.4
1906	988.488	987.204	987.911	982.1
1907	985.983	985.769	988.95	983.9
1908	988.336	986.282	984.848	984.3
1909	988.693	987.834	984.245	982.7
1910	985.106	986.033	987.931	981.4
1911	995.012	987.696	983.226	982.7
1912	987.716	986.37	985.771	983.6
1913	985.396	990.055	987.995	983
1914	990.555	986.716	986.246	982.9
1915	987.034	989.028	987.647	985.9
1916	986.877	988.642	985.999	985.6
1917	984.525	987.12	989.588	981.7
1918	989.037	988.829	987.533	985.3
1919	987.033	986.032	985.52	984.6
1920	987.136	985.687	984.973	984.2
1921	989.378	988.196	988.775	980
1922	990.928	986.156	985.815	982
1923	988.003	989.7	987.216	984.9
1924	988.383	985.236	983.864	978.8
1925	995.25	987.5	984.012	984.6
1926	988.383	987.094	985.619	986.8
1927	984.543	989.719	988.244	984.4
1928	992.261	986.082	987.33	984.2
1929	989.964	987.744	986.103	984.2
1930	991.469	984.907	988.73	982.7
1931	989.396	985.609	986.947	981.8
1932	992.466	985.932	986.453	983.7
1933	987.725	986.249	985.236	982.6
1934	988.425	986.231	984.455	981.4
1935	989.217	988.92	986.068	983
1936	991.456	987.917	984.076	981.7
1937	988.524	987.929	983.597	980.7
1938	993.682	988.324	982.373	983
1939	993.067	988.111	987.605	982.9
1940	987.572	988.255	982.165	982.1
1941	990.915	987.505	987.461	983.3
1942	989.718	984.823	986.543	984.3
1943	986.381	987.01	986.479	983.1
1944	991.763	986.154	987.526	987.5
1945	993.118	987.613	987.799	983.3
1946	991.894	988.374	988.049	987
1947	988.253	985.19	987.671	980.3
1948	992.153	987.181	985.891	984
1949	993.054	986.146	988.132	979.5
1950	987.402	986.889	986.617	981.6
1951	990.211	991.008	987.277	987
1952	985.536	989.389	986.65	983.7
1953	989.379	989.559	985.496	986.5
1954	989.099	988.906	987.775	983.6
1955	990.223	988.976	987.408	983.1
1956	989.031	992.501	988.135	983.4
1957	992.648	989.587	988.455	986.4
1958	986.379	991.432	988.436	985
1959	988.525	990.534	988.317	983.3
1960	987.94	988.236	986.653	984.1
1961	986.346	987.835	987.446	985.5
1962	985.485	986.776	989.596	985.3
1963	991.883	986.612	991.639	983.6
1964	994.591	987.302	994.938	983.5
1965	990.892	987.919	989.866	984.9
1966	990.502	987.849	986.874	982.9
1967	990.459	986.446	986.091	984
1968	989.694	988.852	990.305	985.1
1969	987.605	987.877	985.999	985.1
1970	990.985	989.247	986.52	986.1
1971	991.49	987.856	986.99	985.6
1972	988.444	990.161	987.952	984.8
1973	984.869	987.86	987.038	982.8
1974	989.295	988.152	991.738	983.6
1975	989.972	989.67	989.716	984.8
1976	991.77	986.201	987.432	984.7
1977	987.316	989.431	987.036	984.5
1978	989.024	988.003	988.704	985.1
1979	992.859	986.685	984.83	984.4
1980	988.545	990.693	987.332	983.9
1981	988.869	989.184	987.931	983.5
1982	993.414	986.979	985.919	985.1
1983	989.206	989.409	987.431	983
1984	991.302	988.033	985.001	985
1985	990.132	988.91	985.695	983.2
1986	989.506	990.135	989.059	982.4
1987	988.108	987.561	985.468	982.1
1988	986.814	986.78	988.094	985
1989	987.14	986.237	983.182	982.2
1990	989.891	989.49	985.098	982.9
1991	990.793	988.842	987.742	984.8
1992	988.637	989.57	989.276	984.3
1993	987.374	986.532	982.498	982.3
1994	987.104	986.861	985.459	984.5
1995	987.196	984.885	991.053	982.5
1996	987.688	985.502	990.597	985.1
1997	989.479	984.415	984.534	984.4
1998	984.688	983.65	986.456	980.3
1999	984.102	984.019	987.128	980
2000	991.225	984.479	986.127	983.7
2001	986.996	986.676	984.72	981.2
2002	987.224	990.01	987.982	987.6
2003	990.257	987.378	983.627	985.2
2004	988.111	984.242	985.559	983.7
2005	988.281	986.203	986.965	981.9
2006	986.24	986.645	987.114	983.7
2007	984.764	987.349	990.336	988
2008	985.449	989.483	986.76	982.8
2009	989.098	987.834	987.929	985.2
2010	988.237	986.75	982.747	982.8
2011	983.559	986.404	988.127	983.8
2012	986.756			
2013	988.012