DJF	MAM	JJA	SON
1905	990.163	991.59	990.34	983.831
1906	987.501	988.219	995.654	986.793
1907	989.982	985.99	996.923	989.292
1908	990.231	989.698	990.389	987.702
1909	990.794	987.277	989.663	990.828
1910	990.681	991.705	992.524	986.682
1911	994.597	995.818	990.353	990.937
1912	990.28	986.011	993.385	986.638
1913	990.947	987.495	996.223	986.922
1914	988.526	988.632	994.492	985.95
1915	990.157	989.311	992.523	992.424
1916	987.968	992.381	998.014	988.276
1917	987.717	992.139	993.026	990.819
1918	989.988	991.636	995.746	991.309
1919	990.38	994.822	990.995	984.686
1920	990.795	990.529	994.516	987.866
1921	992.755	991.827	991.261	991.349
1922	992.616	988.162	991.095	989.747
1923	987.167	988.255	996.207	993.411
1924	989.317	991.318	992.419	990.398
1925	998.344	986.02	993.335	988.171
1926	990.834	995.288	997.57	989.69
1927	986.872	988.168	991.986	989.559
1928	991.999	993.519	994.312	990.887
1929	989.08	991.458	989.393	986.826
1930	991.665	988.943	993.908	989.954
1931	989.752	993.756	990.234	990.885
1932	992.715	991.072	996.072	983.655
1933	990.637	991.716	993.164	986.551
1934	988.214	989.299	990.49	989.352
1935	992.046	987.278	996.518	989.183
1936	991.217	989.144	996.05	988.883
1937	988.677	991.094	994.163	987.087
1938	991.549	993.078	989.851	987.104
1939	993.016	992.829	994.706	986.69
1940	988.668	988.268	992.844	991.238
1941	991.5	992.071	994.299	988.376
1942	988.703	992.463	992.725	994.858
1943	987.425	987.412	991.639	987.862
1944	994.005	991.467	992.144	993.534
1945	991.57	991.188	997.203	988.168
1946	991.499	991.733	994.676	987.032
1947	988.61	990.71	993.449	985.544
1948	989.9	989.743	993.854	989.326
1949	993.817	992.147	991.103	984.124
1950	987.958	993.575	992.063	990.282
1951	991.296	991.951	989.888	992.249
1952	986.242	990.667	997.058	988.011
1953	989.1	989.931	990.177	988.092
1954	991.742	990.367	993.32	989.271
1955	992.249	989.104	993.113	989.521
1956	991.475	997.593	996.241	987.909
1957	992.621	988.771	993.623	990.883
1958	986.457	993.784	994.116	986.66
1959	989.988	987.741	995.031	985.565
1960	991.161	988.191	990.286	986.875
1961	987.906	987.714	993.802	984.197
1962	986.315	993.6	991.856	991.513
1963	990.536	987.255	995.654	992.154
1964	996.974	991.581	995.06	991.778
1965	991.247	991.964	993.51	982.67
1966	992.622	989.809	992.379	989.363
1967	990.055	990.729	996.593	987.251
1968	991.764	989.611	985.988	988.974
1969	989.907	989.314	994.97	984.563
1970	991.28	987.855	994.721	992.083
1971	994.043	993.243	994.435	989.096
1972	990.971	992.604	997.037	988.879
1973	988.728	986.353	995.861	989.999
1974	990.968	991.693	996.403	988.879
1975	990.135	991.57	993.951	987.701
1976	993.543	989.927	987.037	992.897
1977	990.458	987.863	996.721	986.156
1978	989.881	997.197	990.483	988.308
1979	993.215	993.326	989.722	988.29
1980	990.869	993.242	993.408	989.514
1981	988.232	994.538	993.562	987.397
1982	993.028	988.228	995.321	987.479
1983	989.649	994.908	992.492	987.784
1984	993.898	990.505	998.51	991.313
1985	987.67	992.901	993.022	990.434
1986	989.574	993.411	986.71	988.528
1987	990.841	990.771	995.31	988.72
1988	988.43	993.601	994.421	991.032
1989	992.052	991.919	992.774	988.912
1990	989.974	992.272	987.092	983.455
1991	993.225	990.5	991.3	991.756
1992	995.803	995.882	998.022	990.335
1993	988.421	989.706	992.357	987.549
1994	990.141	993.698	994.821	989.724
1995	990.689	990.634	990.336	988.324
1996	990.213	988.673	991.057	989.284
1997	990.705	991.067	992.63	991.009
1998	986.501	994.975	987.971	986.548
1999	986.963	992.024	992.434	989.006
2000	990.651	995.748	998.384	994.163
2001	988.475	992.724	990.443	988.501
2002	990.824	991.428	994.228	993.261
2003	990.439	993.968	991.205	987.764
2004	990.077	992.92	991.589	988.111
2005	991.822	988.549	995.133	994.256
2006	988.413	990.138	997.302	987.608
2007	987.812	992.841	991.808	990.508
2008	985.183	990.604	995.504	991.749
2009	990.855	988.988	994.044	985.684
2010	987.727	988.475	990.127	992.058
2011		990.081	998.742	992.133