Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,6245,6700,7140,7289,7756,7842,7536,7691,7473,8104,7468,7111,7367,
1991,6467,7149,7586,7963,7918,8059,7891,8049,7783,8406,7746,7785,7737,
1992,7307,8063,8345,8636,8658,9093,8755,8390,8455,8680,8227,8345,8436,
1993,7214,7832,8372,8868,8868,9312,8939,8612,8831,9071,8612,8876,8621,
1994,7906,8199,8909,9216,9620,9768,9211,9435,9745,9680,8709,9086,9129,
1995,8672,8812,9185,9481,9448,9939,9743,9723,9630,9484,9290,9383,9399,
1996,8487,8778,9388,9534,9880,9813,9497,8560,9312,9370,9578,9422,9302,
1997,8930,9715,9605,9755,10187,10318,10037,10157,9696,9449,9714,10564,9844,
1998,9125,9914,10117,10223,10187,10804,10453,10709,10596,10927,10643,11361,10422,
1999,10130,10260,10936,11250,11346,11603,11366,12131,11945,11968,11352,11310,11300,
2000,10484,11257,11445,12030,12376,12500,12708,12465,12359,12307,11772,11666,11947,
2001,10645,11533,12312,12172,12197,12378,12173,12659,12245,12501,12003,11559,12031,
2002,11842,12614,12392,12992,13566,13534,13598,14398,13825,14122,13671,13278,13319,
2003,12730,13356,13178,14064,14215,14121,13900,13941,13973,14019,13148,13458,13675,
2004,12176,13009,13838,14190,13850,14230,13882,13790,13836,13689,13403,13384,13606,
2005,12268,12468,12421,13553,13794,14239,8018,7008,13052,13245,13100,13014,12182,
2006,12574,13779,6802,1281,1456,2038,1974,1167,1325,2195,,,,