YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 24-hr Avg.
2006         5792 5723 5641 5634
2007 5189 5411 5804 5878 6207 6466 6802 6692 6300 6163 6106 5652 6056
2008 5231 5454 5805 5980 6458 6654 6860 6841 6324 6227 6003 5845 6140
2009 5510 5722 5817 6148 6676 6871 7205 7121 6715