YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	9468	9937	10655	11608	11757	13809	13363	12711	11393	10888	10186	9170
1991	9169	10211	10507	11355	11772	12905	13014	11539	10464	10521	9843	8859
1992	8859	9636	10906	12001	12855	13937	13666	13084	12239	11967	10542	10738
1993	10030	10721	11652	13085	14439	14760	14668	14599	13694	13023	11540	11801
1994	11253	11647	13170	13785	14410	15882	15569	14838	13576	13170	11356	11527
1995	11491	12179	12566	13881	14418	15289	16025	15604	13959	13391	12138	11808
1996	11384	12153	12897	14335	14899	16121	16038	15724	14829	13534	12598	11644
1997	11253	12261	12657	13708	13544	15090	14988	14927	13829	13232	12287	12028
1998	11536	12325	12465	14370	14283	15427	15706	14835	13739	13041	11814	11886
1999	11595	11905	12785	14053	14611	15316	15516	15078	14190	13436	12366	12405
2000	11798	12682	13268	14477	14421	15809	15761	15403	14304	13712	12238	12981
2001	12016	12778	13647	14948	15460	16148	15993	15953	15204	14343	13449	13046
2002	12248	12902	13380	15484	15639	16425	16241	15921	15041	14508	13571	13295
2003	12948	13344	13439	14704	15282	15767	15378	14715	15123	14178	12710	13174
2004	11824	12584	13853	14972	14791	15410	15497	15088	14455	13752	12914	13258
2005	12243	13116	13343	14298	14561	15579	15404	15171	13672	13261	12396	12493
2006	11924	12670	12654	13899	14635	15386	14938	14690	13753	13197	12409	12517
2007	12152	12540	13237	14089	14601	15178	14657	14695	13690	13399	12422	12157
2008	11321	12139	12081	13363	14410
2009											10222	11115
2010	10118	10680	11228	11758	12246	12790	12610	12566	12113	11604	10422	10846
2011	10208	10478	10686	11727	12380	13023	12544	12353	11640	11508	10388	11316
2012	10113	10382	10615	12133	12673	12965	12333	12557	12093	11624	10688	11258
2013	9381	10521	11427	12141

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