Commodity2005200620072008200920102011
Chalk$7,541,000$9,558,000$12,077,000$12,763,000$10,543,000$12,286,879$18,038,686
Total$7,541,000$9,558,000$12,077,000$12,763,000$10,543,000$12,286,879$18,038,686