YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	21516	22252	26118	27984	29896	33400	36462	37109	30788	27322	25391	22982	28475
1991	21566	24977	26555	28885	30875	35751	41933	43238	34778	30376	27308	27774	31213
1992	25196	27777	29991	31638	33849	37338	41573	42467	34194	34036	30675	28562	33224
1993	27471	30479	32719	36729	37637	41662	45445	48324	39613	37011	32851	33322	36983
1994	30275	31347	34860	37000	38178	42254	46760	47628	38751	32883	30882	31746	36922
1995	29906	31912	34046	35943	38204	40786	44433	45378	38992	36040	33313
1996	26327	33692	36210	39215	40891	45745		49601	42071	39115	32437	32080
1997	32059	35276	37294	39535	41605	45399	49317	50853	43106	40293	37801	37209	40812
1998	33053	37440	39962	41633	44106	47495	49695	51146	44622	41626	38403	38727	42326
1999	33826	36931	40543	42340	43341	47510	51125	51112	45308	42395	36565	38691	42474
2000	34394	38086	40922	42111	42822	47555				40835	37912	36656
2001	34816	37038	40500	40737	43195	47480	52315	53510	45575	42742	40118	38073	43008
2002	36338	38997	39538	43268	45760	49474	54140	54551	46311	44727	41533	41107	44645
2003	38173	40814	40052	43697	46543	50989	54799	55634	47981	46559	40358	40768	45531
2004	37215	41981	44933	46695	45463	52889	56930	55803	49493	46715	44353	43871	47195
2005	39413	44580	46638	47612	49934	54615	57386	58609	50371	47929	44993	44444	48877
2006	42967	45604	48279	49628	51537	56022	58544	59274	52795	50811	46258	45659	50615
2007	42894	45826	48166	49447	52477	56142	59513	60918	52375	49946	47628	44082	50785
2008	39679	44228	46594	48235	50576	52786	55936	56474	50036	48242	44106	38462	47946
2009	40583	44142	44917	48093	50546	54132	58629	57640	50472

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