YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	345	363	470	568	618	861	1075	978	769	617	449	311
1991	336	401	421	546	599	796	1117	1011	825	673	389	343
1992	319	350	521	551	618	887	1245	920	765	640	405	288
1993	233	248	371	437	526	744	1082	992	912	860	566	384
1994	364	420	579	682	762	1049	1418	1300	1202	883	594	487
1995	489	546	626	727	916	1010		1298		920	664	532
1996	524	529	611	739	794	957	1290	1171	967	848	577	461
1997	445	478	537	655	734	901	1196	1186	984	819	594	443
1998	384	429	539	675	752	963	1294	1189	985	773	533	395
1999	357	354	450	588	666	871	1215	1125	956	748	565	406
2000	364	384	490	587	687	922	1237	1059	812	693	461	355
2001	326	330	452	559	671	878	1190	1082	857	700	488	273
2002	314	330	368	656	631	855	1146	1140	939	735	450	347
2003	323	343	428	625	670	1047	1244	1081	905	778	508	390
2004	364	378	537	671	681	893	1195	1050	882	710	510	396
2005	361	425	518	613	709	933	1206	1047	858	724	523	378
2006	369	420	500	644	708	918	1254	1206	891	748	544	421
2007	424	442	595	712	796	1005	1202	1135	962	860	618	483
2008	442	485	595	742	766	972	1169	1073	843	735	541	417
2009	424	454	470	666	671	913	1192	1006	877	698	513	441
2010	416	479	629	727	683	941	1249	1166	935	773	543	429
2011	444	467	533	669	663	910	1205	1169	1050	817		597
2012	418	433	507	654	655	908	1210	1013	779	662	459	353
2013	328	348	396	505

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