Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1998,7147,7766,8396,9095,8962,10179,11095,10527,9787,8929,8749,8011,9054,
1999,7547,7912,8979,9505,9866,11810,13125,12844,10176,9028,8822,8290,9825,
2000,7755,8293,9015,9457,9781,11168,12934,11106,9055,8501,8750,8469,9524,
2001,7824,8120,9368,9651,10055,11468,12740,12853,10210,9565,9603,8405,9989,
2002,,,,9369,10291,11900,12111,12701,10152,9398,8621,8695,,
2003,,7981,8894,9466,10358,11199,13239,,10360,10085,8290,8230,,
2004,8030,9400,9396,10447,10270,11796,13474,12366,10661,9736,9178,8592,10279,
2005,,,,,,,,,,,,,,
2006,,,,,,,,,,,,,,
2007,,,,,,,,,,,,,,
2008,,,,,,,,,,,,,,
2009,,,,,,,,,,,,,,
2010,,,,,,,,,,,,,,
2011,,,,,,,,,8647,8169,7198,7172,,
2012,6334,6943,,,,,,,,,,,,
2013,6581,6713,8156,8657,9090,10305,12201,11398,9130,8699,7648,7208,8815,
2014,6636,6866,8182,8905,,10783,13787,11385,9497,8974,7271,7950,,
2015, ,8416, , , , , , , , , , , ,
2016, , , ,10013,10009, , , , , , , , ,
2017, ,2356,2463, , , , , , , , , , ,
2018, , , , , , , , , , , , , ,
2019, , , , , ,13194,15043,13439,11804,10816,9287,9083,11809,
2020,7694,8454,8174,5239,8414,11322,13533,12564,12159,10435,8597,8360,9579,
2021,8016,8056,10125,10641,12012,14306,15679,13523,12797,11276,11088,9393,11409,
2022,8349, ,10646,11055,12262,14044,14995,13560,12856,11950,10516,9230,11608,
2023,8626,9140,10596,11165,12479,14311,16280,14024,12900,11948,10887,9788,11845,
2024,8457,9332,10513, , , , , , , , , , ,