YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	8561	9083	9479	9673	10423	10359	9901	9655	9474	9552	9111	8428	9476
1991	8241	9050	9245	9880	10265	10162	10023	9722	11210	10919	9579	9577	9825
1992	9340	9812	9976	10587	10856	11061	10410	10863	11463	10829	9718	10071	10444
1993	9136	9880	10506	10948	11078	11520	11030	10757	11051	10728	9999	9983	10553
1994	9605	9965	10755	11660	11161	11245	9909	10304	10652	10501	9822	9816	10449
1995	9482	9998	10329	10799	11278	11322	10814	10964	10727	10731	10101	10215	10563
1996	9380	10150	10605	11142	11758	12225	11511	11272	11639	11111	10957	10017	10981
1997	10039	10564	10643	11603	12109	11961	11325	11317	11521	11397	10494	10258	11103
1998	10072	10527	10679	11391	11757	11825	11546	11347	11226	11075	10443	10474	11030
1999	9858	10243	10867	11206	11821	12004	11385	11189	11364	11261	10393	10228	10985
2000	9823	10259	10479	11061	11368	11347	11085	10973	10862	10505	9997	9619	10615
2001	9202	9833	10255	10527	10853	10960	11275	11135	11145	10799	10192	9833	10501
2002	9656	9904	10255	10925	11996	11186	10861	10225	10386	10194	9712	9617	10410
2003	9448	9550	9414	10441	11474	10512	10184	11097	12173	9956	8912	9597	10230
2004	9034	9057	9764	10277	10373	10676	10058	10008	10079	9656	9231	9382	9800
2005	8647	9316	9546	10195	10319	10475	9972	10261	10099	10016	9389	9275	9793
2006	8761	9320	9519	9975	10528	9936	9578	10265	10288		9235	9094
2007	8805	9275	9498	10194	10499	10133	9605	9639	10349	9593	8390	8991	9581
2008			8957	9987	10255	8235	8086

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