DJF	MAM	JJA	SON
1905	989.147	985.748	987.423	977.619
1906	988.283	986.94	990.959	982.165
1907	985.402	985.947	993.775	982.937
1908	989.015	986.443	987.745	986.761
1909	989.088	985.124	988.488	990.386
1910	988.588	987.398	993.118	987.441
1911	994.024	990.29	987.505	981.46
1912	988.016	987.747	990.618	985.799
1913	986.422	991.887	988.636	985.156
1914	988.994	989.971	988.018	980.911
1915	988.173	989.385	991.98	990.049
1916	989.65	989.091	991.817	986.582
1917	986.579	988.017	992.364	985.748
1918	989.219	987.882	994.813	985.778
1919	988.33	985.223	988.167	987.191
1920	989.083	987.003	988.902	981.897
1921	990.094	987.121	989.972	983.326
1922	992.196	989.574	988.739	982.815
1923	986.181	989.661	991.528	988.097
1924	989.815	987.992	984.422	982.526
1925	994.628	987.36	987.666	983.77
1926	991.283	985.971	990.952	987.028
1927	984.732	988.778	996.046	983.191
1928	992.776	985.53	991.643	988.04
1929	990.476	987.474	991.041	982.694
1930	989.832	983.32	993.215	984.88
1931	990.131	982.804	991.103	984.051
1932	993.012	985.263	993.524	983.257
1933	987.618	987.521	986.616	982.729
1934	986.527	986.538	990.176	984.18
1935	989.109	988.623	992.344	984.263
1936	992.402	987.198	990.501	984.556
1937	987.809	990.342	988.243	983.092
1938	993.004	988.802	988.31	984.206
1939	991.543	984.733	991.304	984.482
1940	985.249	989.956	983.733	984.888
1941	990.75	988.263	989.953	985.3
1942	986.942	984.702	987.454	986.97
1943	985.932	987.801	989.648	983.451
1944	990.618	987.204	985.202	986.917
1945	990.848	989.806	989.475	987.304
1946	991.423	987.445	995.299	986.973
1947	987.606	983.265	993.213	983.788
1948	990.799	989.245	989.07	988.422
1949	992.699	985.612	991.637	983.904
1950	986.921	987.627	988.572	984.947
1951	990.018	991.299	992.148	986.056
1952	987.976	988.036	990.466	988.288
1953	987.691	990.112	989.361	986.756
1954	989.875	991.542	991.24	983.602
1955	990.11	988.956	993.951	986.448
1956	991.193	990.884	993.671	984.229
1957	990.665	992.552	991.672	986.001
1958	987.377	990.272	991.282	985.467
1959	988.507	994	990.197	982.524
1960	989.765	988.001	990.498	985.728
1961	985.619	988.91	991.185	983.724
1962	985.376	986.875	989.594	986.535
1963	991.301	986.29	993.185	983.31
1964	996.305	985.031	995.772	985.203
1965	990.285	986.781	991.556	982.749
1966	992.99	989.422	989.453	982.979
1967	990.605	988.037	986.95	984.278
1968	994.443	989.833	992.701	988.402
1969	988.284	987.444	989.018	983.385
1970	992.375	989.544	989.113	985.937
1971	993.275	988.681	989.453	987.396
1972	989.725	991.656	994.341	982.627
1973	987.147	989.376	991.4	982.963
1974	991.37	986.263	994.913	983.935
1975	990.58	990.475	993.444	983.48
1976	994.444	985.712	991.153	986.71
1977	986.451	989.581	990.968	981.963
1978	988.204	987.521	993.17	983.417
1979	991.409	987.105	987.638	983.752
1980	989.287	990.641	991.401	984.021
1981	987.574	989.145	994.839	983.489
1982	992.817	988.235	989.019	983.741
1983	990.302	991.144	989.643	981.777
1984	993.412	989.856	991.103	983.852
1985	989.78	990.402	988.726	982.953
1986	989.228	989.824	990.205	985.078
1987	989.792	988.874	988.843	983.546
1988	988.828	987.448	987.083	987.485
1989	989.09	986.001	986.583	983.354
1990	990.013	990.842	988.697	981.515
1991	990.295	989.472	991.209	985.341
1992	990.494	986.687	992.443	985.475
1993	987.183	987.612	986.605	983.207
1994	985.717	988.205	989.641	987.258
1995	988.343	985.493	996.748	983.429
1996	988.713	986.212	990.421	986.554
1997	986.258	985.12	988.677	984.936
1998	985.086	984.897	989.175	982.431
1999	986.376	984.364	988.143	980.672
2000	990.613	985.047	991.741	985.746
2001	988.825	987.579	988.728	983.493
2002	988.317	991.057	990.837	988.102
2003	987.88	985.728	988.269	985.63
2004	990.523	983.902	988.474	983.401
2005	990.243	985.204	986.313	984.847
2006	987.154	987.192	988.446	981.546
2007	984.188	986.712	991.951	984.718
2008	987.123	991.043	990.37	983.439
2009	989.006	988.703	992.802	985.024
2010	988.345	986.102	984.639	981.802
2011		987.18	990.985	984.363
2012				984.571
2013				985.647