YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	6223	6778	8237	8511	9034	10276	10438	10835	9068	8156	8018	6335	8501
1991	6054	7193	8564	8410	9100	10319	10513	11356	9390	8844	8042	7753	8805
1992	7458	8150	9012	9162	9682	11191	11378	11346	10232	9292	8562	7377	9432
1993	6394	7259	8916	9373	9448	11865	12202	12404	10673	9896	8524	7840	9579
1994	7745	8398	10285	10645	11244	12312	12566	12441	10474	9723	9017	8338	10277
1995	7870	8469	9982								9750	8670
1996	7719	8402	10321	10461	11351	12270	12722	13195	11360	10599	10184	8996	10632
1997	8241	9154	10900	10801	11669	12781	13353	13557	11931	11233	11000	9916	11211
1998	8821	9912	11257	11517	12350	13977	14278	14595	12811	12027	11820	10324	11974
1999	9800	10385	12311	12275	12989	14391	14974	15376	13329	12486	12407	10817	12628
2000	9648	10838	12539	12502	13212	14434	15104	15608	13285	12533	11821	10686	12684
2001	9714	10642	12802	12687	13535	14575	14955	15463	13652	12695	12774	10475	12831
2002	9982	11662	13411	12854	14104	15525	15585	16180	13788	13217	12556	12079	13412
2003	10733	11284	12667	12917	14156	15314	15960	17105	14253	13570	12368
2004	10317	9740	13541	13647	14085	15057	15838	15810	14010	13344	12968	11667	13335
2005	10282	11735	13781	13431	13985	15455	16330	16504	13695	13205	13107	11784	13608
2006	10825	11922	13994	14449	12452	16318		17278	15761	14077	14797	12245
2007	11218	12319	14425	14323	14586	18095			14610	14036	13844	11721
2008	10102	11406	13699	13250	13556	14618

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