YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1998,7147,7766,8396,9095,8962,10179,11095,10527,9787,8929,8749,8011,9054
1999,7547,7912,8979,9505,9866,11810,13125,12844,10176,9028,8822,8290,9825
2000,7755,8293,9015,9457,9781,11168,12934,11106,9055,8501,8750,8469,9524
2001,7824,8120,9368,9651,10055,11468,12740,12853,10210,9565,9603,8405,9989
2002, ,,,9369,10291,11900,12111,12701,10152,9398,8621,8695
2003,,7981,8894,9466,10358,11199,13239,,10360,10085,8290,8230
2004,8030,9400,9396,10447,10270,11796,13474,12366,10661,9736,9178,8592,10279
2005,
2006,
2007,
2008,
2009,