YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1992,,,49815,50637,50065,54920,54035,50387,48334,47237,43065,41598
1993,36715,41150,46211,46495,43394,48166,52092,53086,51207,49794,44906,43559,46427
1994,36717,42362,49782,48202,50721,52213,42540,44963,43615,42520,38346,37196,44096
1995,
1996,
1997,,55763,58201,59423,62152,65749,63025,65448,63020,62792,60603,59633
1998,52630,60584,64201,65106,65600,71025,68976,69870,67553,67825,64643,60869,64907
1999,60821,62226,66152,68505,68945,73682,70384,70838,67864,68962,63813,63638,67153
2000,62094,66843,70634,72234,73797,77471,74514,77685,73319,72695,69640,68144,71589
2001,64005,68891,73431,74475,75003,77925,75617,78020,73032,73434,70439,66801,72589
2002,64299,67932,70173,73014,74547,76523,75307,76112,71425,73423,69385,67922,71672
2003,66524,68670,69618,71549,72909,75915,74856,74450,72553,72899,67640,68876,71372
2004,63175,68842,74590,75703,74604,78179,78754,79270,75700,76336,75968,73859,74582
2005,67800,72628,76305,76466,76428,80884,78402,80869,75947,75595,73477,71370,75514
2006,69634,73643,76881,76620,78445,82939,78334,,79265,77517,74948,71487
2007,70318,73671,76831,77277,78573,80164,78324,81254,75200,73732,72272,67311,75411
2008,64135,69481,71972,73888,73806