YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	8275	8923	9895	9969	10319	10475	10058	10629	10282	10175	9264	8147
1991	8023	9097	9762	10535	10525	10910	10175	10737	10489	10483	9381	8818
1992	9029	9786	10613	10813	10677	11077	11329	11094	10989	10514	9599	9313
1993	8623	9370	10074	11445	11487	11987	11773	11836	11776	11621	11192	10855
1994	9772	10412	11537	11302	11262	11821	11438	12090	12105	11691	11000	10157
1995	10475	11055	11546	12469	12390	12748	12274	12485	12083	12150	10597	10128
1996	10427	10971	11729	12193	12226	12564	12273	12618	12601	12222	11351	10035
1997	10201	11458	12203	12251	12337	13196	12607	12957	12888	12169	11662	11035
1998	10582	11497	12300	12679	12647	13042	12498	12904	12632	12449	11843	11251
1999	11041	11327	12490	12729	13075	12865	12668	12972	12502	12340	12114	10985
2000	10635	11674	12153	12922	12985	13137		12580	12637	12296	11408	10748
2001	10385	11113	12205	12714	12776	13087	12717	13010	12903	12498	11692	10791
2002	11131	11848	12338	13454	13582	13770	12874	13246	13186	13435	12227	11375
2003	11659	12247	11619
2004			13065	13031	12541	13123	12623	12952	13057	12657	12133	11863
2005	11274	12358	12954	13154	13056	13764	13401	14039	13338	13072	12343	11670
2006	11833	12654	13589	14235	14425	14425	13660	14511	14240	14332	13507	12481
2007	12535	13095	13989	13883	13795	12919	12290	13084	13159	13080	12226	11557
2008	11082	12358	12882	13604	13368	12686	11991	12283	12582	12600	11665	11403
2009	11057	12096	12482	13137	11596	11996	11839	12178	12363	11723	11532	11045
2010	10818	11928	12591	12717	12113	12419	12200	12387	12487	12254	11671	11040
2011	11034	11478	11755	12210	11800	11832	11767	11995	11882	11899	11601	11517
2012	11139	11647	12015	12684	12370	12731	12290	10650	11546	12395	11965	11501
2013	11208	12347	13229	13456

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