Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,39782,42283,46222,46929,48166,51768,50094,50446,46480,46936,46075,39792,46263,
1991,40540,44798,46465,48789,49547,57503,56208,58188,53533,54158,48542,47831,50538,
1992,46292,49007,52508,54021,54825,59229,59154,55325,55438,57615,47087,44325,53057,
1993,39793,44493,49306,50282,54081,57413,56720,57725,58255,55533,53237,51570,52405,
1994,46311,51218,53210,52509,54670,59148,55412,57854,53963,50069,46805,46719,52325,
1995,46538,,,,,,,,,,,,,
1996,,,,,,,,,62558,59176,58983,56871,,
1997,54390,58708,61521,62085,63684,67237,65771,67378,64372,63509,61458,61295,62617,
1998,57220,61997,64954,66512,66531,72263,72445,72025,68975,68967,65734,64186,66817,
1999,61845,63137,67387,68981,70296,74918,73203,73966,70259,70720,67396,65393,68958,
2000,61896,66737,70267,72220,73550,77763,75332,77871,73307,73185,69304,68510,71662,
2001,64066,69396,73740,74895,75082,78335,75792,78159,72343,72324,69283,63050,72205,
2002,63877,68528,70357,73823,75176,77057,75551,76199,71412,73300,69031,67719,71836,
2003,66129,68339,69072,71759,73555,76214,76228,75940,72976,73251,67638,68479,71632,
2004,62372,67541,73328,74431,73689,76618,77109,77498,74057,73518,71373,71287,72735,
2005,65933,70814,74575,75459,75337,78878,76824,79965,74612,74236,71445,69830,73992,
2006,67949,71625,74933,75469,,,,,,,,,,
2007,,,,,74467,77604,76100,78259,72927,68967,68371,65078,,
2008,60665,66702,68499,69687,70650,71168,69389,69517,66907,66704,61962,58210,66672,
2009,57517,62014,62314,65179,66182,69003,65377,,,,,,,
2010,,,,,,,,,,,,,,
2011,,,,,,,,76962,74013,75994,71754,71752,,
2012,67524,71688,74656,77456,78408,80892,79052,81034,78232,79145,75244,71609,76245,
2013,66035,73469,77880,79477,81279,85251,80499,79586,77146,77715,72939,69304,76715,
2014,67533,71041,75484,77754,79179,81474,78443,79867,77662,77727,69941,71917,75669,
2015,69855,74992,77024,78872,80660,85028,83774,83158,81639,83195,78111,75499,79317,
2016,75437,80611,84901,88284,90007,94193,91580,93095,90507,91710,86482,77218,87002,
2017,70718,82990,89969,94062,100695,103388,99996,101049,98652,100939,94459,90492,93951,
2018,88659,92589,98244,102760,104778,108748,105141,104697,102631,103695,98453,91020,100118,
2019,88811, ,90347,92933,94021,97308,95861,96605,94357,94290,88062,85320,92538,
2020,82070,86914,74370,55155,70545,81252,82291,84600,84142,84759,75472,73850,77952,
2021,73457,74746,85418,88724,91426,96077,97357,94998,91344,91735,87989,87466,88395,
2022,77082,84397,88521,90893,93281,95047,93375,94848,92890,93781,86024,80134,89189,
2023,81495,85148,87301,92831,96005,98210,94338,98029,94502,95357,90733,84678,91552,
2024,76703,87711,90291, , , , , , , , , , ,