YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1991												12413
1992	11682	12696	13687	14285	14027	14774	15042	15295	15069	14422	12943	12179	13881
1993	10982	12463	13460	14069	14826	15797	16296	16571	16476	15640	14329	13945	14582
1994	13611	13886	16079	16304	16267	17230	17515	17883	17804	16578	15528	14927	16146
1995	14204	15562	16457	16762	16808	17761	17676	18194	17765	17561	16365	15461	16715
1996	13752	16358	17372	17533	17287	18412	18326	18717	16785	17503	16812	14998	16988
1997	14627	16595	17552	18010	17683	18278	18465	19880	19365	18623	18105	17200	17865
1998	16005	17598	18650	19731	19391	20386	20368	20847	20036	19543	18704	17581	19070
1999	16331	17332	19216	19421	20044	21015	21464	22108	20428	19596	19092	18176	19519
2000	16966	18640	19735	19701	20310	21501	21470	23228	22064	21543	18999	18981	20262
2001	17337	19019	20533	21313	21506	22589	22068	22939	21763	21474	20367	17992	20742
2002	17675	19602	20624	19609	19339	19272	21432	23810	23044	21859	20915	20324	20625
2003	19253	20177	20935	22098	22716	23061	22989	23770	23671	22910	20974	19897	21871
2004	18180	19400	21956	22843	22169	23232	23154	23782	23355	22248	21459	20681	21872
2005	18803	20900	22003	22839	22036	23262	23736	24738	22981	22082	21266	20512	22097
2006	19033	20049	19443	22399	22330	22967	22251	22492	21828	22380	21507	20745	21452
2007	19394	20180	23332	23966	22222			23553	23219	22747	22329	19894
2008	18909	20294	21741	22699	22473	22718	22831	22623	23091	22437	21115	19430	21697
2009	19559
2010
2011				22661	22548	23526	23487	24274	23640	23024	21784	21100
2012	20102	21311	21984	23576	23539	23992	24289	24947	24362	23779	22589

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