Commodity200520062007200820092010
Carbon dioxide$2,688,476$3,997,924$5,512,933$5,806,012$10,713,989$15,467,290
Silicon dioxide  $49,381 $23,391$85,293
Total$2,688,476$3,997,924$5,562,314$5,806,012$10,737,380$15,552,583