YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,30899,32618,33025,32939,32932,33636,31995,33310,31034,32133,21650,13727,29972
1991,13432,14353,14122,14542,14531,14319,13603,14147,13157,13683,9219,26087,14621
1992,29162,32202,33978,32704,31117,33286,31592,22190,19734,20463,18931,15688,26804
1993,17325,19741,20925,20670,19756,19558,14741,15434,20667,20646,19772,20222,19105
1994,19318,20197,21338,20996,20375,21598,18799,19998,19389,19171,18482,18632,19852
1995,18699,19351,19601,19851,,21153,19279,19827,19368,19597,19049,18978
1996,18507,20063,20828,20582,20312,21292,19287,20050,19764,19417,18901,18482,19790
1997,18350,19437,19896,20281,20248,21131,19397,19826,19710,19511,18812,18915,19626
1998,18039,19924,20175,20474,20087,21031,19711,19999,19258,19108,18015,18801,19552
1999,18571,19107,19745,20135,19987,20462,18484,18563,17993,18133,17373,17438,18833
2000,17359,17879,18160,18279,18031,18848,18080,17853,17724,17779,16864,17284,17845
2001,16601,17541,17855,17992,17902,18845,17244,17751,16956,17128,16699,16403,17410
2002,16559,16691,16089,17376,17298,17301,16621,16947,16529,16925,16245,16155,16728
2003,14489,13907,13476,13937,13569,13990,13153,13029,14224,15050,14006,14787,13968
2004,14292,15222,15813,15598,15188,15663,15109,15611,15443,15166,14888,15267,15272
2005,14806,15781,16102,16110,15640,16334,15264,16169,15628,15343,15085,15101,15614
2006,15084,15976,16215,15883,16026,16300,14880,16090,15600,15609,15244,15073,15665
2007,15270,15846,16169,15929,15860,15692,15015,16072,15720,15700,14904,14689,15572
2008,14914,15604,15247,15740,15413,14952,14506