Commodity2005200620072008200920102011
Chalk$2,396,652$3,685,189$4,807,083$7,457,020$4,802,843$6,864,665$7,408,494
Total$2,396,652$3,685,189$4,807,083$7,457,020$4,802,843$6,864,665$7,408,494