Commodity2005200620072008200920102011
Chalk$11,841,827$12,674,936$13,476,673$14,139,421$12,646,247$12,889,448$11,812,761
Total$11,841,827$12,674,936$13,476,673$14,139,421$12,646,247$12,889,448$11,812,761