YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,20890,23168,24160,23881,27278,28179,26716,27360,24416,23790,23910,23222,24757
1991,21033,23219,24664,25755,27724,27589,27982,27945,24871,24125,24247,26495,25488
1992,24004,25407,27569,30341,32768,29722,29602,29964,28022,28409,27974,29224,28675
1993,25248,26038,28026,30882,30791,27463,27353,27685,26024,30858,28310,31299,28352
1994,25827,26601,30398,33057,33684,35999,34827,34980,29965,31386,28794,31834,31480
1995,
1996,,,31792,33842,34754,36179,35191,35796,32431,28741,31367,31850
1997,29287,30970,31869,32791,34075,33970,33914,35161,33044,33441,32840,34094,32955
1998,31764,34733,36498,37681,38674,39072,37360,37581,35002,34903,33291,33710,35856
1999,31705,32395,35252,37164,37970,37950,36304,36929,34703,34462,33004,33592,35119
2000,30831,32659,33926,35431,35953,36246,34645,35620,33694,33476,31897,32872,33938
2001,29802,31877,33656,34855,35898,36582,35403,36574,33881,34310,33100,32835,34064
2002,30947,32698,33450,35539,36445,35542,34077,36811,35284,35693,34334,35022,34654
2003,33148,34872,35389,37530,39549,37657,37859,38774,38141,38194,35789,36712,36968
2004,33112,35335,37617,39063,38570,39060,38753,38897,37169,36766,35551,37035,37244
2005,33935,36081,37540,38558,38742,39829,38449,40295,37770,37622,36379,37180,37698
2006,35236,37206,38045,39362,40783,40843,39014,40975,38692,38302,37169,37408,38586
2007,35202,36974,39125,39756,39077,,,,38457,38051,36592,36205
2008,33316,35913,36675,38574,39254,37796