Commodity2005200620072008200920102011
Chalk$2,783,390$3,582,430$6,359,120$7,824,088$5,420,104$3,249,233$4,534,443
Total$2,783,390$3,582,430$6,359,120$7,824,088$5,420,104$3,249,233$4,534,443