Commodity2005200620072008200920102011
Chalk$3,709,756$2,408,670$4,988,215$4,114,269$2,356,312$4,448,687$11,688,479
Total$3,709,756$2,408,670$4,988,215$4,114,269$2,356,312$4,448,687$11,688,479