Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2007,,,,,,12327,12169,12421,11384,10863,10370,8589,,
2008,7689,8273,9947,10452,10754,11115,11374,11145,10527,10243,9743,8628,9991,
2009,8433,9151,9961,10577,11210,11829,12313,12030,11392,10685,10099,8939,10552,
2010,8537,9391,10351,10741,10927,11953,12460,12110,11557,11161,9699,8905,10649,
2011,8822,9220,10082,10621,10866,11701,12206,12040,11271,10835,9924,9246,10570,
2012,8661,9299,10038,10598,11120,11579,11970,12208,11460,10931,10194,8998,10588,
2013,8220,9097,10353,10470,11086,11635,12006,11833,11095,10760,10048,9009,10468,
2014,8715,9035,10449,10771,11014,11757,12157,11919,11580,11054,9996,9366,10651,
2015,9069,10180,11184,11378,11914,12843,13102,12739,12238,11682,10889,9667,11407,
2016,9327,10284,11392,11709,12394,13407,13677,13481,12840,12458,11699,9474,11845,
2017,8260,9368,11575,12117,12875,13526,13843,13665,12753,12377,11572,10107,11837,
2018,9770,10205,11289,12177,12887,13998,14347,14201,13385,12831,11868,10125,12257,
2019,9928,9821,11076,12415,13314,14246,14683,14300,13490,12662,11709,10454,12341,
2020,9818,10582,10338,8406,11117,13060,13912,13665,13495,12555,10794,10265,11501,
2021,10075,10247,12246,12959,13643,15278,15382,14759,14094,13340,12527,10751,12942,
2022,9961,10975,11977,12596,13253,14270,14091,14207,13819,13099,12112,10590,12579,
2023,10142,10767,11689,12982,14029,15003,15089,14854,14529,14121,12876,11322,13117,
2024,10173,11850,12212, , , , , , , , , , ,