YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
2004,,,,,27600,22279,23654,23061,21294,20037,18879,19037
2005,15783,18232,18936,19676,20824,22332,23689,24212,22198,19703,19046,17056,20141
2006,17344,18272,19152,19744,21299,22338,22956,22914,21047,19897,18398,17836,20100
2007,16007,17668,18966
2008,,17785,17391,18091,19525,20388,21755