YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	6780	7151	7843	8018	8645	9079	9292	9424	8790	8436	7672	6613	8151
1991	6594	7402	7647	8008	8569	9087	9441	9809	9124	8887	7955	7681	8356
1992	7063	7959	8226	8297	9111	9667	9821	9623	9247	9251	8198	7688	8705
1993	6772	7837	8369	8843	9429	10097	10523	10861	10254	9918	9069	8699	9230
1994	8094	8235	8610	9260	9939	10043	10304	10546	10031	9583	8681	8332	9312
1995	7953	8582		8817	9762	10318	10676	11066	10504	9847	9248	8516
1996	7223	8030	9051	9471	9990	10550	10814	11278	10836	10951	9406	8363	9664
1997	7958	9262	9345	9951	10522	10847	11438	11680	10805	10615	10028	9342	10149
1998	8394	9584	9850	10182	10764	10650	11466	11241	10933	10889	10115	9345	10284
1999	8993	9563	10084	10648	11031	11374	11779	11812	11513	11112	10406	9401	10643
2000	9046	9769	9925	10430	11140	11231	11270	11348	10507	10517	9898	9017	10342
2001	8659	9442	9806	10175	11139	11076	11352	11899	11054	10744	10236	9211	10399
2002	8926	9692	9730	10408	11363	11390	11712	12111	11326	11171	10438	9854	10677
2003	9283	9862	9598	10345	11280	11641	11556	11267	10972	11042	9971	9677	10541
2004	8654	9752	9991	10164	10779	11263	11644	11610	11047	10770	10116	9724	10460
2005	8903	9981	10025	10109	10721	11274	11370	11685	10746	10373	9955	9414	10380
2006	9098	9780	10012	10144	10661	11236	11031	10565	10050	10722	10674	9559	10294
2007	8848	9476	9999	9249	10808	10876	11062	11380	10415	10688	10105	8993	10158
2008	8519	9121		9636	10384	10320	10520	10755		10883	10190	8837
2009	8574	9605	9618	10159	10843	10977	10990	11556	11339

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