YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1998,,14859,16450,18191,20815,,16739,,,,,12135
1999,15139,16197,17336,19283,,23928,24536,,22264,21483
2000,,,17437,20432,,,,23932
2001, 
2002, 
2003,
2004,discontinued