Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2004,,,,,27600,22279,23654,23061,21294,20037,18879,19037,,
2005,15783,18232,18936,19676,20824,22332,23689,24212,22198,19703,19046,17056,20141,
2006,17344,18272,19152,19744,21299,22338,22956,22914,21047,19897,18398,17836,20100,
2007,16007,17668,18966,,,17226,17220,17580,15532,15010,13993,12641,,
2008,10937,17785,17391,18091,19525,20388,21755,21697,19794,19001,17360,15093,18235,
2009,14963,16263,16238,18455,19459,20238,21587,21453,19493,17975,16861,16845,18319,
2010,15976,16664,17340,19143,20169,19593,20405,20689,18950,18280,16035,15615,18238,
2011,14131,14783,15816,16317,17287,18711,19552,19864,18024,16818,15052,15406,16813,
2012,13664,14760,15169,16176,16836,17676,18202,12562,11200,10420,9714,9782,13847,
2013,9119,10085,10359,10321,11040,11468,12414,12925,11462,10676,9943,9583,10783,
2014,9623,9663,10595,10994,11542,11802,12785,12879,11352,10675,9755,9832,10958,
2015,9151,10322,10540,11019,11773,12306,13092,12788,11744,11169,10262,10081,11187,
2016,9852,10751,10965,11379,12462,12645,13126,12855,11871,10548,10155,9835,11370,
2017,9466,10158,11042,11164,11760,13250,14490,14674,13381,13117,11407,10727,12053,
2018,10807,10850,11714,12043,13374,13412,13693,13114,11998,11626,10704,10742,12007,
2019,10436,10214,11428,11887,12879,13577,13909,13636,12456,11656,10606,10556,11937,
2020,10117,11495,9880,8528,11267,12893,13470,13413,12918,12149,10710,10886,11478,
2021,10919,11114,12417,12693,13650,14515,14946,14180,13480,13021,11756,11208,12825,
2022,10081,11675,12451,12633,13515,14048,14714,14447,13524,12814,10959,10832,12641,
2023,11485,11702,12192,12370,13609,13899,14542,14645,12526,11874,11109,11506,12622,
2024,10283,11474,12099, , , , , , , , , , ,