YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,9468,9937,10655,11608,11757,13809,13363,12711,11393,10888,10186,9170,11251
1991,9169,10211,10507,11355,11772,12905,13014,11539,10464,10521,9843,8859,10849
1992,8859,9636,10906,12001,12855,13937,13666,13084,12239,11967,10542,10738,11741
1993,10030,10721,11652,13085,14439,14760,14668,14599,13694,13023,11540,11801,12847
1994,11253,11647,13170,13785,14410,15882,15569,14838,13576,13170,11356,11527,13359
1995,11491,12179,12566,13881,14418,15289,16025,15604,13959,13391,12138,11808,13562
1996,11384,12153,12897,14335,14899,16121,16038,15724,14829,13534,12598,11644,13846
1997,11253,12261,12657,13708,13544,15090,14988,14927,13829,13232,12287,12028,13317
1998,11536,12325,12465,14370,14283,15427,15706,14835,13739,13041,11814,11886,13452
1999,11595,11905,12785,14053,14611,15316,15516,15078,14190,13436,12366,12405,13605
2000,11798,12682,13268,14477,14421,15809,15761,15403,14304,13712,12238,12981,13905
2001,12016,12778,13647,14948,15460,16148,15993,15953,15204,14343,13449,13046,14415
2002,12248,12902,13380,15484,15639,16425,16241,15921,15041,14508,13571,13295,14555
2003,12948,13344,13439,14704,15282,15767,15378,14715,15123,14178,12710,13174,14230
2004,11824,12584,13853,14972,14791,15410,15497,15088,14455,13752,12914,13258,14033
2005,12243,13116,13343,14298,14561,15579,15404,15171,13672,13261,12396,12493,13795
2006,11924,12670,12654,13899,14635,15386,14938,14690,13753,13197,12409,12517,13556
2007,12152,12540,13237,14089,14601,15178,14657,14695,13690,13399,12422,12157,13568
2008,11321,12139,12081,13363,14410
2009,