YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,6207,6689,7215,7318,7387,7350,7729,7800,7444,7272,7054,6366,7155
1991,6382,2535
1992,,7368,7678,7834,7608,7597,8055,7757,7657,7504,7279,6551
1993,6507,7614,7817,7974,8546,8691,9281,9048,8580,8574,8219,8121,8252
1994,7846,8502,9143,9307,9360,9352,9558,9601,9206,9137,8725,8308,9006
1995,8239,8960,9169,9216,9692,9664,9864,9659,9220,9277,8853,8517,9194
1996,8210,9021,9405,9615,9627,9597,9652,10554,10996,9868,9415,8867,9569
1997,8848,9644,10075,10371,10743,10727,10407,9869,10177,10628,10242,9935,10139
1998,9682,10573,11066,11595,11838,11546,11723,11625,11823,11648,10826,11323,11272
1999,10869,11433,12160,12008,12298,13095,12901,12626,12310,12996,12032,11326,12171
2000,11249,12062,12671,12605,12874,12914,12768,12700,12664,12526,12055,11877,12414
2001,11106,12105,12881,13200,13055,12684,12660,12610,12070,12386,11759,11258,12315
2002,11172,12079,12392,13202,13281,12778,12880,12963,12791,12795,11873,11487,12474
2003,10911,11163,11327,12119,13014,12098,11730,11822,11713,11826,11077,11008,11651
2004,10335,11256,12227,12412,12178,11915,12043,11969,11647,11606,11267,11148,11667
2005,10659,12038,12658,12473,12747,13376,13118,13184,12259,12105,11936,11588,12345
2006,11758,12653,13717,13960,14400,14097,13803,13614,13340,13368,13083,11500,13274
2007,10490,10950,11576,11123,11033,10745,10444,10687,10365,9316,9492,9000,10435
2008,8843,9628,10222,9853,9947,9420,10002,10196,10407,10524,8753,7404,9600
2009,7390,7659,7861,8207,10532,9946,10559,10265,10396