YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,6223,6778,8237,8511,9034,10276,10438,10835,9068,8156,8018,6335,8501
1991,6054,7193,8564,8410,9100,10319,10513,11356,9390,8844,8042,7753,8805
1992,7458,8150,9012,9162,9682,11191,11378,11346,10232,9292,8562,7377,9432
1993,6394,7259,8916,9373,9448,11865,12202,12404,10673,9896,8524,7840,9579
1994,7745,8398,10285,10645,11244,12312,12566,12441,10474,9723,9017,8338,10277
1995,7870,8469,9982,,,,,,,,9750,8670
1996,7719,8402,10321,10461,11351,12270,12722,13195,11360,10599,10184,8996,10632
1997,8241,9154,10900,10801,11669,12781,13353,13557,11931,11233,11000,9916,11211
1998,8821,9912,11257,11517,12350,13977,14278,14595,12811,12027,11820,10324,11974
1999,9800,10385,12311,12275,12989,14391,14974,15376,13329,12486,12407,10817,12628
2000,9648,10838,12539,12502,13212,14434,15104,15608,13285,12533,11821,10686,12684
2001,9714,10642,12802,12687,13535,14575,14955,15463,13652,12695,12774,10475,12831
2002,9982,11662,13411,12854,14104,15525,15585,16180,13788,13217,12556,12079,13412
2003,10733,11284,12667,12917,14156,15314,15960,17105,14253,13570,12368
2004,10317,9740,13541,13647,14085,15057,15838,15810,14010,13344,12968,11667,13335
2005,10282,11735,13781,13431,13985,15455,16330,16504,13695,13205,13107,11784,13608
2006,10825,11922,13994,14449,12452,16318,,17278,15761,14077,14797,12245
2007,11218,12319,14425,14323,14586,18095,,,14610,14036,13844,11721
2008,10102,11406,13699,13250,13556,14618,,14777,,,,10288
2009,10309,11542,13647,13784,14699,15271,,16482,14533