YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,6780,7151,7843,8018,8645,9079,9292,9424,8790,8436,7672,6613,8151
1991,6594,7402,7647,8008,8569,9087,9441,9809,9124,8887,7955,7681,8356
1992,7063,7959,8226,8297,9111,9667,9821,9623,9247,9251,8198,7688,8705
1993,6772,7837,8369,8843,9429,10097,10523,10861,10254,9918,9069,8699,9230
1994,8094,8235,8610,9260,9939,10043,10304,10546,10031,9583,8681,8332,9312
1995,7953,8582,,8817,9762,10318,10676,11066,10504,9847,9248,8516
1996,7223,8030,9051,9471,9990,10550,10814,11278,10836,10951,9406,8363,9664
1997,7958,9262,9345,9951,10522,10847,11438,11680,10805,10615,10028,9342,10149
1998,8394,9584,9850,10182,10764,10650,11466,11241,10933,10889,10115,9345,10284
1999,8993,9563,10084,10648,11031,11374,11779,11812,11513,11112,10406,9401,10643
2000,9046,9769,9925,10430,11140,11231,11270,11348,10507,10517,9898,9017,10342
2001,8659,9442,9806,10175,11139,11076,11352,11899,11054,10744,10236,9211,10399
2002,8926,9692,9730,10408,11363,11390,11712,12111,11326,11171,10438,9854,10677
2003,9283,9862,9598,10345,11280,11641,11556,11267,10972,11042,9971,9677,10541
2004,8654,9752,9991,10164,10779,11263,11644,11610,11047,10770,10116,9724,10460
2005,8903,9981,10025,10109,10721,11274,11370,11685,10746,10373,9955,9414,10380
2006,9098,9780,10012,10144,10661,11236,11031,10565,10050,10722,10674,9559,10294
2007,8848,9476,9999,9249,10808,10876,11062,11380,10415,10688,10105,8993,10158
2008,8519,9121,,9636,10384,10320,10520