YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,7967,8685,9766,10180,10745,12249,12984,11919,11022,10297,9725,8008,10303
1991,8012,9241,10320,10733,10859,12280,13134,13424,11311,11133,9897,9872,10862
1992,9070,9957,10675,11598,11860,12900,13904,13870,12018,12048,10701,9702,11562
1993,8962,9796,10993,11887,12050,13472,14969,14857,12682,12412,10964,10474,11974
1994,10084,10509,11943,12225,13465,14269,15172,15471,13695,12562,11477,11574,12720
1995,10747,11535,12393,12687,13476,14937,16261,16167,14401,13494,12490,12155,13395
1996,10374,11767,13143,13054,13757,15457,16710,16707,14457,13530,12533,11600,13591
1997,11309,12510,13627,13557,14339,15730,17177,16981,14929,14162,13472,12108,14158
1998,11671,12985,13779,14694,14999,16773,17940,17867,15392,15330
1999,11915,13300,14689,14803,15620,17326,18709,18566,15966,15108,14366,13350,15310
2000,12449,13542,14546,14821,15501,16984,18508,18020,15478,15085,13587,13275,15150
2001,12439,13274,14690,14958,15050,16838,17800,17939,15776,15284,14448,13030,15127
2002,12389,13903,15050,15012,16347,17416,18511,18862,16044,15664,14428,14286,15659
2003,13304,13800,14611,15369,16332,17605,19146,19280,15938,15858,14770,12764,15731
2004,12364,12757,15064,15880,15864,17326,18969,18487,16401,15704,14718,13947,15623
2005,12323,14003,15302,15315,15912,17476,18976,18393,15688,15087,14142,13728,15529
2006,12890,13966,15225,15554,15967,17643,18811,18118,16531,15617,14849,14378,15796
2007,13242,14190,15760,15911,16453,17896,18856,18686,16737,15971,15350,13445,16041
2008,12718,13569,14990,14962,15753,16430,17687,17142,15192,15098,,13466
2009,12973,13849,14526,15407,16501,17507,19576,18342,16553,15626,14817,13537,15768
2010,12677,14025,14977,15834,16083,17546,19923,18513,16619,15854,14149,13692,15824
2011,13021,13539,14577,15440,15170,17033,18894,17883,16553,15598