Sub-Chapter200520062007200820092010
Salt (including table salt)$5,965$2,576$11,447$22,947$9,994$27,258
Natural graphite. $2,498$7 $16,585 
Natural sands of all kinds$3,138$15,239$65,675$73,317 $786
Other clays (not including expanded clays of heading 68.06), andalusite, ky ...$89,335$215,115$39,719 $48$48
Chalk.   $61  
Natural calcium phosphates  $600   
Pumice stone; emery; other natural abrasives$5,638$8,127$17,761   
Marble, travertine, ecaussine and other stone  $207  $1,961
Granite, porphyry, basalt, sandstone and other stone$9,533$6,676    
Pebbles, gravel, broken or crushed stone$712,345$716,805$955,841$162,705$9,145$15,463
Dolomite, whether or not calcined or sintered    $1,024 
Natural magnesium carbonate (magnesite)     $1,352
Limestone flux; limestone     $553
Portland cement, aluminous cement, slag cement$320,593$1,422,307$3,667,281$5,069,707$4,244,181$3,706,119
Asbestos. $11,316  $1,968 
Natural steatite, whether or not roughly trimmed$7,151     
Mineral substances $12,906 $64$1,870 
Total$1,153,698$2,413,565$4,758,538$5,328,801$4,284,815$3,753,540