Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1995,,401,414,444,455,497,494,474,530,647,498,361,,
1996,325,374,442,488,514,472,468,491,500,572,466,333,454,
1997,338,402,462,466,503,485,444,420,463,499,531,390,450,
1998,357,422,473,501,488,523,497,498,525,497,589,375,479,
1999,375,395,484,520,540,508,482,491,509,525,583,434,487,
2000,368,449,498,538,573,538,526,601,577,537,567,509,523,
2001,428,458,517,513,567,536,533,533,559,571,541,384,512,
2002,406,442,523,533,599,573,555,624,632,584,607,392,539,
2003,401,440,505,483,576,626,528,570,655,605,545,430,530,
2004,388,431,539,563,580,560,538,557,620,577,563,426,529,
2005,495,450,502,492,571,589,521,530,551,525,534,424,515,
2006,429,465,503,548,604,551,500,521,565,574,586,447,524,
2007,441,415,527,519,550,559,538,564,582,533,593,441,522,
2008,339,461,540,584,560,534,506,521,570,526,582,373,508,
2009,388,431,497,571,652,604,558,546,587,580,527,442,532,
2010,425,457,548,544,556,569,538,527,566,657,591,463,537,
2011,435,428,475,539,549,582,541,603,592,628,526,502,533,
2012,447,530,483,508,526,521,499,548,569,581,506,441,513,
2013,431,433,528,518,516,499,444,499,490,510,411,419,475,
2014,378,379,481,496,525,548,474,540,540,571,393,473,483,
2015,413,517,573,536,575,583,541,556,603,661,476,434,539,
2016,473,519,561,601,597,575,546,566,600,563,516,368,540,
2017,375,544,586,574,644,587,544,547,550,563,523,422,538,
2018,521,427,515,572,595,589,539,512,601,611,591,455,548,
2019,452,377,554,617,600,609,564,600,608,640,600,499,560,
2020,462,494,578,594,642,611,659,728,687,724,560,520,605,
2021,545,529,694,701,682,668,590,594,621,656,597,496,614,
2022,483,527,603,589,603,600,526,561,612,645,519,462,561,
2023,465,478,513,634,668,617,556,626,678,693,623,462,584,
2024,370,573,581, , , , , , , , , , ,