Sub-Chapter2005200620072008200920102011
Salt (including table salt)$27,857  $14,443$22,026$24,533$36,685
Unroasted iron pyrites.      $628
Natural sands of all kinds$141$40 $40  $1,096
Quartz (other than natural sands); quartzite $362  $60 $22,971
Kaolin and other kaolinic clays, whether or not calcined.$4,279    $83 
Other clays (not including expanded clays of heading 68.06), andalusite, ky ...$80$89$5$25,961$95 $1,773
Chalk.     $822$133
Natural calcium phosphates    $26  
Siliceous fossil meals  $4,471    
Pumice stone; emery; other natural abrasives   $543   
Slate   $2,244   
Granite, porphyry, basalt, sandstone and other stone $25  $321  
Pebbles, gravel, broken or crushed stone$170 $50$1,699$205$4,602$19,135
Gypsum; anhydrite; plasters   $900   
Limestone flux; limestone  $5,004    
Quicklime, slaked lime and hydraulic lime  $18,735$25,401$18,274$7,628$3,892
Portland cement, aluminous cement, slag cement$20,280$16,728$867,841$1,366,375$2,124,944$1,171,893$941,274
Natural steatite, whether or not roughly trimmed $2,114     
Mineral substances    $539$132$40,865
Total$52,807$19,358$896,106$1,437,606$2,166,490$1,209,693$1,068,452