YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1992,,,,,,,,,16368,18748,17638,17830
1993,16061,19376,20515,21236,15299,19552,20720,21507,23234,23282,23454,20880,20419
1994,21853,23746,25012,24719,24160,25281,23719,25130,25928,25496,24586,23829,24453
1995,23594,25547,26972,25415,,26514,24934,26270,26979,27288,26125,24655
1996,24739,26235,27358,27551,25882,26764,25004,26350,27382,26834,26433,23750,26190
1997,24415,26779,26596,27940,26813,27192,25487,26693,27890,27530,26982,25721,26670
1998,25144,27820,27760,28373,27067,28065,26044,27202,27486,27644,25816,25982,27034
1999,26375,27827,28355,29207,27787,28088,26319,27754,28403,28912,27622,26329,27748
2000,26212,28179,25123,25033,27505,27523,,27747,27541,27716,26244,26074
2001,25238,27734,28153,29194,28091,28744,27211,28818,29497,30310,29280,27132,28284
2002,28606,30553,29988,32517,30691,29614,28882,30344,30949,31952,29885,29186,30264
2003,30343,32491,31548,33543,31715,31742,30679,30873,32543,32389,29392,29822,31423
2004,28500,31096,32309,32976,30456,30850,29081,30115,32218,30508,,28138
2005,29992,32044,32193,32730,30718,31609,29333,31917,31476,31717,31197,29851,31231
2006,30140,32214,32699,32196,31717,31692,29267,31907,32271,32197,31438,29424,31430
2007,30664,32179,32528,32989,31862,31154,29795,31931,31748,33928,,25876
2008,28757,32077,31097,33180,31331,29865,29245