Commodity2005200620072008200920102011
Chalk$1,810,109$2,640,182$3,840,461$5,251,443$3,521,994$3,042,370$3,114,360
Total$1,810,109$2,640,182$3,840,461$5,251,443$3,521,994$3,042,370$3,114,360