YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,7021,7209,7732,7977,8098,8320,8323,8436,7879,7646,7228,6897,7733
1991,7516,7466,7453,7860,7948,8124,8208,8283,8010,7956,7545,7219,7801
1992,7400,7508,7727,8029,8248,8603,8330,8279,8309,8014,7532,7230,7956
1993,7619,7850,8060,8469,8685,9032,8761,8727,8465,7860,7246,6956,8164
1994,6888,7330,7677,7710,7766,8452,7707,8017,7777,7890,7274,7614,7677
1995,7330,7500,7644,7893,8110,8333,8065,8339,8169,8008,7636,7652,7890
1996,7616,8143,8187,8506,8454,8883,8728,8810,8583,8701,8118,8073,8400
1997,7755,8360,8445,8708,8887,9276,8935,8952,8969,9064,8412,8355,8677
1998,8203,8499,8773,9077,9096,9407,9690,9340,9094,9385,8825,8825,9018
1999,8469,8664,9140,9213,9480,9833,9647,9433,9319,9645,8950,8788,9215
2000,8436,9068,9027,9376,9407,9494,9297,9228,9153,9269,8658,8667,9090
2001,8305,8631,8980,9334,9346,9627,9321,9419,9227,9326,8534,8252,9025
2002,8302,8342,8789,9256,9458,9517,9450,9477,9106,9466,8792,8703,9055
2003,8651,8721,8680,9241,9427,9621,9373,9134,9276,9661,8637,8536,9080
2004,8424,8789,9263,9478,9372,9584,8818,7543,8128,,,7387
2005,7728,8331,8752,8955,9044,9509,9050,9225,9221,9245,8806,8584,8871
2006,8591,9059,9322,7765,8808,9573,9114,9375,9623,9567,8943,8826,9047
2007,8829,9164,9157,9423,10055,,,10048,9565,10092,9263,8771
2008,9137,9345,9372,9603,9777,9610,9481