DJF	MAM	JJA	SON
1905	989.364	989.879	988.845	986.981
1906	988.109	990.504	990.444	983.092
1907	986.107	987.693	992.226	985.972
1908	988.784	988.168	985.905	983.871
1909	989.788	990.273	988.149	985.333
1910	987.421	989.549	993.949	984.873
1911	994.79	990.199	985.426	986.69
1912	990.994	989.121	988.969	986.689
1913	987.279	992.543	992.529	985.103
1914	988.444	988.806	990.423	985.835
1915	987.112	991.283	993.091	985.894
1916	987.531	990.196	992.349	985.543
1917	984.961	988.665	995.712	983.724
1918	988.928	989.318	991.917	987.262
1919	985.051	987.519	988.284	985.916
1920	986.26	988.379	991.353	984.924
1921	986.742	989.176	989.911	983.113
1922	991.108	990.246	989.032	983.841
1923	989.335	990.241	992.974	986.941
1924	988.933	987.137	989.515	982.857
1925	993.33	989.178	987.404	986.699
1926	989.917	989.666	992.009	987.017
1927	983.004	991.818	990.241	985.255
1928	990.527	988.037	989.413	984.879
1929	990.978	990.497	987.132	984.146
1930	990.109	986.186	993.854	986.818
1931	989.027	987.577	989.02	985.119
1932	992.605	988.466	989.16	984.704
1933	986.257	989.889	988.157	984.676
1934	987.176	987.737	987.499	983.241
1935	987.765	991.222	991.783	984.765
1936	993.328	989.148	988.604	985.645
1937	988.006	989.407	989.43	983.621
1938	992.781	989.738	987.116	983.821
1939	991.932	989.484	992.655	985.336
1940	986.685	990.4	987.881	983.516
1941	989.769	989.071	991.956	985.721
1942	988.649	987.476	990.045	984.741
1943	985.447	989.845	988.246	984.348
1944	990.864	989.538	989.467	987.222
1945	991.224	990.28	994.372	985.814
1946	991.275	990.254	990.021	987.904
1947	988.2	987.357	991.412	983.004
1948	992.439	990.647	990.952	985.573
1949	994.181	989.129	990.302	983.631
1950	986.573	989.273	991.197	982.404
1951	991.969	992.821	987.581	988.845
1952	989.089	991.517	988.309	985.618
1953	989.718	991.248	988.092	987.011
1954	989.901	990.289	990.271	986.269
1955	990.529	990.295	990.484	985.239
1956	992.317	992.306	988.541	985.659
1957	994.192	990.892	988.955	989.204
1958	988.188	993.127	989.03	985.962
1959	988.951	993.811	991.081	984.752
1960	987.44	990.005	987.44	985.158
1961	985.115	989.542	989.308	986.747
1962	985.638	987.259	990.864	986.93
1963	990.168	988.706	992.662	985.293
1964	995.927	988.47	996.688	985.522
1965	990.889	989.898	990.449	986.568
1966	991.659	990.616	988.923	985.103
1967	990.191	988.823	988.23	986.14
1968	992.999	992.955	987.908	987.812
1969	988.24	991.047	987.888	986.698
1970	990.546	991.303	988.15	986.989
1971	990.631	990.383	988.81	985.689
1972	989.691	993.018	991.396	984.987
1973	984.774	991.134	988.344	984.768
1974	990.652	990.516	993.453	984.29
1975	988.862	992.363	991.83	984.184
1976	992.898	989.022	986.735	985.17
1977	987.447	992.183	989.802	985.066
1978	989.121	989.526	987.411	985.565
1979	992.531	989.474	986.705	985.387
1980	988.04	993.483	989.919	986.173
1981	988.174	991.158	989.917	985.288
1982	993.324	989.109	987.168	986.515
1983	991.015	991.299	989.142	984.288
1984	992.085	989.56	987.437	983.998
1985	990.295	991.624	987.071	983.167
1986	990.103	990.722	987.836	983.809
1987	988.62	990.636	987.453	984.425
1988	987.464	989.173	990.651	985.829
1989	987.787	987.445	985.349	982.867
1990	990.992	990.775	986.741	984.665
1991	990.418	988.586	990.154	985.665
1992	989.723	993.513	991.539	984.122
1993	988.471	989.31	986.474	984.423
1994	986.46	990.873	989.515	987.068
1995	988.145	987.573	991.198	984.355
1996	987.158	989.477	991.112	985.81
1997	989.013	986.424	986.809	986.574
1998	985.424	987.611	986.222	982.229
1999	984.382	985.804	988.047	982.372
2000	990.552	987.213	989.706	984.82
2001	987.242	988.311	986.555	981.885
2002	989.052	992.682	989.445	987.137
2003	989.797	989.795	987.33	986.306
2004	988.923	986.492	986.797	985.104
2005	989.954	987.312	987.161	982.029
2006	987.508	988.27	990.334	983.752
2007	983.937	989.809	995.814	987.636
2008	985.806	991.396	987.712	982.107
2009	991.098	989.898	992.963	984.562
2010	987.888	988.983	981.861	983.211
2011		988.201	993.516	986.832