YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	11450	12294	13144	13256	15335	16119	13587	13710	12568	13066	12470	11350	13199
1991	11627	12548	13073	13682	13712	13703	12748	12875	12501	15091	14403	13126	13260
1992	12898	13819	17200	17618	17651	17887	16668	15323	14857	14981	14193	13935	15632
1993	11437	13049	16247	16655	16655	16126	16212	15132	15444	15700	15812	15698	15359
1994	13883	14727	16139	16315	16554	17127	16486	16558	16425	16287	15585	15040	15932
1995	15287	16182	16760	17274	17262	17538	16602	17262	18569	17539	16928	16068	16939
1996									15607	15015	16405	16543
1997	16614	17524	18597	19241	19888	20448	19110	18940	18474	18056	18093	17849	18570
1998	17024	18664	19147	19528	19307	20006	19683	19642	19665	19637	19590	16721	19051
1999	18962	19097	20387	20970	21147	21368	20783	21310	21102	21514	20314	19547	20542
2000	19031	20402	20943	21924	21913	21743	21624	23652	22026	21788	20739	20231	21335
2001	23310	20675	22806	22526	22452	22070	22315	21983	21071	21119	20253	19405	21665
2002	23832	26466	27135	28502	28559	27851	27463	28208	27656	28218	26951	25953	27233
2003	24187	20938	20810	21714	22008	22668	21282	21534	21183	21381	20230	20299	21520
2004	19145	20665	21951	22910	23658	22097	21846	22862	22928	21420	21533	21679	21891
2005	20826	25751	23850	22875	23023	23258	25180	27395	22673	22795	22499	22208	23528
2006	21919	23989	28555	31657	32256	31786	30102	28091	26869	26608	25773	21856	27455
2007	19206	20710	21128	21129	20638	19992		21180	20465	20928	20043	19053
2008	17863	19916	20074	20979	20625	19509	19413	19596		18739	18217	18077
2009	17494	19083	19031	19460	20734	19856	19078	18940	19261

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