YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	14203	14947	16112	16082	16099	16505	15895	16452	14861	15177	15885	17791	15841
1991	13644	14897	15528	15819	16270	16344	16367	14811	11701	13929	15614	17293	15191
1992	14601	15555	15796	16452	16366	16128	16242	16468	15692	15950	15707	17761	16107
1993	14402	15547	16407	16830	17019	17472	17530	17635	17013	17280	17213	19174	16970
1994	16224	17522	17691	17670	17816	18363	18368	18734	17519	17812	18023	20114	17993
1995			13784			18347	17429	18348	17523	17823	18632	20443
1996	16748	18390	18535	18554	18751	19042	18240	18745	18169	17882	18237	19386	18390
1997	16383	17643	17943	18180	18587	18734	18510	18849	17669	18123	18545	20377	18295
1998	17395	18143	18740	18913	19496	19671	19380	19811	18635	19044	19274	20837	19112
1999	17860	18771	19233	19648	20166	20498	20026	20303	19435	19639	19575	21153	19692
2000	17815	18993	19110	19489	19539	19988	20795	22736	21006	19970	19669	21091	20017
2001	17768	18736	19339	18728	19127	19553	19572	19892	18397	18446	19251	20043	19071
2002	17382	18405	18799	18625	18874	18412	18475	19479	17842	18246	18798	20137	18623
2003	17478	17567	16711	17336	17889	17916	17423	17715	17410	18906	18733	20170	17938
2004	17884	18029	19089	19249	18855	19360	19326	19121	17731	18075	18433	20416	18797
2005	16814	18249	18310	18507	18786	19036	18910	19416	17433	17549	17980	20192	18432
2006	17094	18137	18792	19167	19520	19818	19257	19243	18103	18903	19791	21464	19107
2007	18384	19591	20401	20194	20754	20863	20553	21444	20048	20436	20612	21741	20418
2008	18797	20076	20460	21189	21959	21689	21333	21244	20319	21445	21790	22746	21087
2009	20464	21489	21279	23179	23439	22249	22141	22112	20693

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