YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 24-hr Avg.
2005  8656 8688 9315 9155 8884 8550 9368 9191 9611 8315 7550
2006 7790 8321 8774 8969 9105 8999 8657 9403 9043 9059 8000 7397 8626
2007 7282 8022 8475 8813 8944 8599 8566 9409 9075 9092 8186 7183 8471
2008 6959 7712 8022 8692 8851 8527 8637