Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,280,297,409,413,452,519,592,547,504,498,421,271,434,
1991,241,280,363,378,478,539,633,582,510,574,424,308,444,
1992,287,332,405,406,486,534,654,582,553,661,483,304,476,
1993,255,266,391,485,474,485,609,568,545,611,466,325,458,
1994,297,297,421,448,521,579,641,604,661,668,481,395,502,
1995,356,361,426,,520,564,685,722,669,697,536,408,,
1996,295,319,410,443,478,515,633,619,573,607,504,346,479,
1997,301,358,421,422,505,538,660,641,578,647,534,385,499,
1998,309,364,435,464,516,586,704,696,636,610,539,369,519,
1999,340,357,455,457,526,589,749,714,661,630,586,393,538,
2000,341,391,450,545,567,606,738,637,642,637,532,388,540,
2001,366,359,447,475,560,638,708,707,646,679,643,379,551,
2002,323,375,536,520,,,,,693,724,552,425,,
2003,377,368,,,607,588,681,678,603,711,530,388,,
2004,333,367,499,502,557,601,701,677,657,682,540,384,542,
2005,317,391,502,469,553,568,711,687,591,614,519,362,524,
2006,318,352,478,455,496,598,660,591,581,638,525,378,506,
2007,321,357,460,457,517,574,642,619,618,638,530,336,506,
2008,295,301,430,422,493,507,575,551,558,606,527,326,466,
2009,293,327,420,425,528,583,658,580,647,653,561,353,502,
2010,309,386,524,445,478,560,668,612,586,652,476,334,503,
2011,301,325,431,436,463,512,618,614,589,622,470,351,478,
2012,314,335,426,431,472,540,629,614,568,555,478,344,475,
2013,292,317,415,406,479,515,609,589,571,559,460,328,462,
2014,305,288,413,433,476,533,643,584,579,615,439,352,472,
2015,327,372,451,453,534,586,666,635,633,634,485,360,511,
2016,330,383,474,479,538,616,715,656,689,658,551,368,538,
2017,308,368,473,523,596,645,755,772,705,663,526,393,561,
2018,370,413,480,514,622,693,762,716,746,713,544,397,581,
2019,364,384,475,538,601,666,828,758,719,696,542,411,582,
2020,350,367,408,347,568,687,852,794,868,782,541,426,582,
2021,402,413,560,634,713,820,918,827,866,772,628,470,669,
2022,421,463,541,595,702,799,839,787,845,825,595,449,655,
2023,433,480,528,634,732,824,937,839,827,785,628,461,676,
2024,405,461,541, , , , , , , , , , ,