YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1992,,,,,,,12763,13604,14318,14582,13721,13861
1993,12538,14076,15178,16265,16205,16876,16503,16474,16171,16529,16309,15901,15759
1994,15024,15923,17446,17822,17650,18252,17688,18234,18006,18135,17396,17010,17389
1995,17242,18329,18843,19280,19364,19884,19407,19533,19048,18902,18223,17774,18819
1996,17230,18603,19683,20193,20724,22340,22348,22593,21349,21590,19924,17694,20356
1997,18533,19862,20298,20703,20778,21100,20474,20674,21056,20719,19967,19489,20304
1998,18880,20526,21397,21648,21506,22042,21451,21387,20988,20677,19469,19667,20803
1999,19485,20201,21606,22024,21668,22135,21223,21463,20892,20558,19925,19740,20910
2000,19392,21104,21702,22104,21287,,,18543,19402,19984,19602,19242
2001,18554,20074,21086,20978,22658
2002,
2003,,17694,18140,20492,21606,21886,21324,21193,21201,21443,19957,20493
2004,19690,21268,22736,23711,22871,23617,22996,22786,22496,22392,21651,21594,22317
2005,21185,23989,24005,24449,23853,24819,23930,24920,23897,23635,23245,22722,23721
2006,22860,25432,26576,27433,27995,28400,26828,27135,26191,25766,24765,23028,26034
2007,22619,24096,24861,24942,25065,24888,23833,24539,23138,23713,22609,21443,23812
2008,21211,22510,22879,,22979,23014,22123,21520,21669,21694,19841,20017
2009,19699,21392,21557,23133,22834,23482,22439,22092,22121