YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1997	1773	2324	2423	2650	3340	3751	4684	4250	3569	3344	2837	2523	3122
1998	2365	2526	2721	3145	3478	4379	5006	4770	3936	3685	2954	2703	3472
1999	2684	2611	3045	3584	3952	4744	5473	4840	4442	4215	3434	3114	3845
2000	2954	3262	3621	4319	4704	5695	6095	5517	4683	4510	3376	3538	4356
2001	3413	3567	4009	4588	5294	5810	6264	5760	4970	4797	4135	3576	4682
2002	3514	3650	3764	4584	5353	6030	6414	5635	4858	4722	3957	3586	4672
2003	3642	3631	3792	4159	4972	5846	6401	5510	4705	4658	3759	3532	4551
2004	3309	3462	3869	4433	4726	5492	6109	5485	4618	4414	3692	3443	4421
2005	3385	3614	3768	4201	4827	5428	6419	5619	4496	4311	3689	3302	4422
2006	3394	3641	3604	4284	5034	5847	6589	5653	4934	4668	3853	3534	4586
2007	3496	3619	4028	4478	5093	5997	6459	5572	4852	4553	3882	3437	4622
2008	3235	3394	3771	4229	5057	5359	5979	5622	4498	4396	3719	3107	4364
2009	3221	3432	3501	4255	5287	5403	6609	5950	4951

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