YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,7648,8240,9440,10029,9875,10854,11935,11568,11101,9711,9050,7767,9775
1991,7588,8890,9584,10038,10242,10892,12260,12032,10890,9797,9111,9069,10040
1992,8657,9441,10093,11080,10786,12324,13344,13169,12286,11485,10049,9398,11043
1993,8267,9258,10719,11422,11289,12796,13349,13905,12844,11713,10651,9927,11356
1994,9718,10003,11481,11850,11849,13117,14320,14051,13182,11827,10820,10304,11888
1995,9990,10903,11281,12163,12229,13263,14692,14360,13824,12434,11517,11199,12321
1996,9335,10786,11939,12892,12313,13864,15207,14886,13576,12444,11452,10077,12398
1997,10236,11324,12300,12739,12841,14735,16199,16292,14971,14029,13084,12241,13416
1998,11447,12497,13439,14219,14111,16076,17235,17296,15732,14860,13483,12557,14413
1999,11943,12857,14383,14790,14624,15830,17331,17107,15717,14670,13576,12456,14607
2000,11813,12967,13911,14311,14562,15850,17453,17189,15604,14776,13200,12785,14535
2001,12165,12991,14168,14916,15050,16280,17501,17326,16533,15541,14661,13288,15035
2002,12758,14133,15267,15712,16422,17704,19390,19177,17872,17108,15900,15126,16381
2003,14635,15301,15975,17126,17780,18974,20207,20355,19144,18740,16383,15809,17536
2004,14756,15989,17764,18201,17967,19931,21686,20929,20052,18667,17559,16683,18349
2005,15118,17143,18035,18464,18710,20559,21664,21511,19193,18197,17411,16550,18546
2006,15791,17287,18334,18898,19139,20991,21953,21371,21036,19833,18585,17892,19259
2007,16984,18219,19854,19619,20449,21844,22748,21678,21701,20706,19159,17012,19998
2008,17661,16909,17881,18887,19358,20287,20856