YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1990	29814	31701	33105	33156	32616	33169	31301	32038	30133	31496	28540	26540	31128
1991	27803	30776	31259	32997	31688	31477	30930	31680	30900	31965	31163	31676	31191
1992	31722	32386	32865	33424	31977	34054	32961	36297	40103	40016	37890	37991	35238
1993	34740	39130	42038	41559	39936	44072	41914	43294	44609	44635	43652	44668	42028
1994	42788	41342	48054	47106	46013	48151	45793	47301	47463	44886	44485	42724	45529
1995	44003	45343	46518	47864	46800	49224	46018	48125	49014	50011	48471	46186	47298
1996	45565	48796	49709	50807	49086	50851	47262	49776	50411	51378	50259	46517	49201
1997	47098	51297	51828	53950	52732	55089	50139	52457	53661	52712	52235	51619	52068
1998	50094	55020	56102	57526	56310	59137	54787	56544	56906	57647	55393	55837	55942
1999	55807	57681	59259	68529
2000
2001
2002
2003
2004					62772	63610	60799	62669	64634	63250	61620	61202
2005	60566	65678	66291	66154	63693	65043	59546	61675	60855	61520	59766	58468	62438
2006	57183	65360						57632
2007	57681						69499	72780	70732	74129	69364	64281
2008	62450	68967	68839		69850	67241	65886	62768	65992
2009									72881

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