Sub-Chapter2005200620072008
Salt (including table salt)$10,107,180$5,117,247$7,336,888$6,104,415
Unroasted iron pyrites.$436,214 $220,891 
Natural sands of all kinds$1,185 $5$646
Quartz (other than natural sands); quartzite  $1,525$45
Other clays (not including expanded clays of heading 68.06), andalusite, ky ...   $102
Natural calcium phosphates$20,360$8,434  
Pumice stone; emery; other natural abrasives $102 $330
Granite, porphyry, basalt, sandstone and other stone$886,678$1,475,136$230,076$321,523
Pebbles, gravel, broken or crushed stone$130,308$51,092 $25,633
Quicklime, slaked lime and hydraulic lime$20   
Portland cement, aluminous cement, slag cement $23,204$1,184$7,468
Total$11,581,945$6,675,215$7,790,569$6,460,162