YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	16354	17438	19891	20770	19800	20091	18936	19408	18269	18517	19685	18518	18978
1991	18518	19773	20334	21125	22693	21130	20706	21514	19980	20283	18868	18648	20302
1992	18830	19809	20538	21791	21211	20994	20334	20563	20754	20612	19017	18827	20327
1993	17944	19791	20849	22013	21597	21959	21247	22186	19845	20025	19871	21234	20719
1994	19629	20800	23114	23041	23182	22840	21805	23473	22638	22799	22426	22459	22359
1995	21904	23542	26206	26581	25832	27981	25480	25839	25527	24553	23494	24556	25125
1996	23775	23673	24838	22237	21977	23283	21707	22008	22968	23936	22033	20170	22717
1997	19479	23026	20791	21369	21623	21936	20603	21082	20785	20607	19733	19648	20890
1998	18796	20311	20999	21967	21758	22152	21066	21306	20409	19355	18465	19960	20545
1999	19028	19337	19003	19554	19569	21458	22661	23604	23553	23765	23100	23860	21541
2000	23621	25100	25862	26939	26978	27489	26077	26867	26346	26123	25055	25319	25981
2001	23930	25570	26442	27539	27690	25632	23956	25422	26535	26751	25946	25187	25883
2002	25219	26626	26704	29010	28739	28735	27942	27947	26813	26884	25545	25190	27113
2003	25274	26422	26249	27931	28387	28613	27699	27396	27308	27405	25196	25771	26971
2004	24111	25512	26622	28103	26909					25491	25160	25452
2005	23773	25938	26787	27528	28043	28261	26537	27782	26649	26085	25318	25057	26480
2006	24740	26120	26734	27528	28498	28795	24773	26918	26234	26145	25448	24824	26396
2007	24122	25155	26922	26798	28184	28082	26623	27486	26134	26619	25336	24225	26307
2008	23482	25061	25189

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