YEAR	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual 24-hr Avg.
1998	14795	16247	16837		18675	17622	16872	17873	19597	18790	17198	16583
1999	15896	16816	18536	19379	19187	21268	22974	21826	20852	19124	18219	17080	19263
2000	15926	17369	18651	20007	19622	21011	22705	21530	19919	18574	17409	17000	19144
2001	16499	17483	18872	19548	19520	20464	21087	21532	19893	18827	19145	17799	19222
2002	16609	18653	19791	20814	22199	23840	24806	24875	23927	22178	20715
2003	17811	19837	20930	22531	23326	24152	26290	27268	25309	24146	21607	20786	22833
2004	19512	20961	22690	24436	23535	26670	28747	27368	26283	24424	22768	23955	24279
2005	
2006	
2007	
2008