YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	7473	8018	8650	9193	9027	9223	9244	9391	9710	9262	9301	8596
1991	8242	8819	10041	10643	11597	11750	14352	12269	11809	11208	10250	10290
1992	9977	10029	10398	11102	11712	12066	12085	12684	12611	12133	11216	10489
1993	9377	10505	11366	12607	13177	13604	13303	13285	13104	12859	11809	11653
1994	10952	11500	12626	13234	13917	14028	13916	14166	13879	13674	12002	11821
1995	11778	12554	13449	14584	14900	15370	14780	15309	14345	14393	12946	12256
1996	11830	12876	13589	14524	15022	14773	13609	11831	12566	14352	13425	14581
1997	13829	15939	16970	18227	18687	18806	17957	18752	19127	18399	16970	16234
1998	13233	13316									21098	20504
1999	20603	21030	22425	23934	24494	26072	25417	25587	26099	27010	24595	24251
2000	22993	23369	26027	28487	27693	27796	25874	29481	29186	29397	27066	26979
2001	25516	27447	30252	32529	32038	32232	31350	32099	30875	31320	29234	28098
2002	27404	29244	29653	32867	35591	31920	32212	32758	31815	32529	30105	29656
2003	29270	30850	30915	34107	37757	35201	34154	33991	32338	32261	28521	30445
2004	28176	30667	33002	35162	34948	36041	35200	35001	34934	35010	33115	33453
2005	31508	33866	35079	36488	36818	37973	36560	37737	35958	35164	33715	33488
2006	32915	35186	35849	37851	38624	39327	37164	38427	37370	37527	35247	34008
2007	33550	35113	36232	37875	39024	37837	37214	38404	36387	37349	35296	33528
2008	32148	34817	35532	37675	38356	37646	36752	36486	36736	35909	33016	32678
2009	31254	33097	33177	36959	39633	38911	37952		37299	35502	33420	33319
2010	31491	34232	35413	36856	37230	38283	37357	37627	36821	36049	33222	33328
2011	33028	34116	34327	36445	37697	38248	36590	37526	36948	36393	33108	34083
2012	32372	34504	34568	37233	38336	37474	36730	37160	36101	34744	32580	32311
2013	30070	33323	34820	37051

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