YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,8422,9065,10657,11267,12007,13384,13582,14216,12563,11429,10727,8880,11362
1991,8421,9707,11273,11332,12181,13626,13990,14854,13072,12215,10918,10604,11863
1992,9655,10761,12285,12590,13483,14850,15520,15132,13901,12932,11613,10251,12788
1993,8869,10127,11996,13293,13853,15180,15968,16157,14814,13855,12560,11838,13226
1994,10304,11019,12938,13229,13877,15249,15637,15810,14628,13506,11912,11703,13332
1995,11098,11803,13431,13742,14505,15812,16231,16618,15369,14439,13477,12245,14064
1996,10810,11858,14039,14386,14974,16104,16561,16646,15227,14362,13585,12206,14230
1997,11836,12623,14519,14334,14972,15961,16337,16531,14828,14740,14031,13312,14502
1998,11823,13428,14812,15475,15927,17283,17689,18525,16724,15582,14854,13864,15499
1999,13230,13997,16276,16736,17420,19073,19356,19355,18271,17565,16660,14879,16902
2000,13597,15316,16762,16968,17660,18956,19204,19877,18261,17374,15983,14866,17069
2001,13502,14757,17161,17583,18244,19377,19668,20245,18830,17614,16452,14685,17343
2002,14105,15801,17370,18043,18808,20332,20539,20692,18845,18503,17112,16126,18023
2003,14970,15535,17362,17942,19076,20487,20716,21096,18393,17618,16593,15925,17976
2004,13414,15308,17812,18253,18448,19476,20148,20094,18829,18179,16942,16139,17754
2005,14350,16091,18012,18115,18463,20122,20432,20370,18451,17803,17193,16008,17951
2006,14972,16354,18043,18520,19099,20932,20852,20973,19717,19101,18171,16719,18621
2007,15523,16857,19020,19404,19600,20311,,,,,,15745
2008,13720,15467,18017,18215,19156,19512,19495,19301,18039,17961,17285,15374,17629
2009,14428,15929,17861,18537,19427,20798,21289,19101,17270