Sub-Chapter20052006200720082010
Salt (including table salt)$290,492$436 $106,237$39,000
Unroasted iron pyrites.$28,346$42,383  $433
Natural graphite.    $1,600
Natural sands of all kinds$6,224,628$538,260$321,277$393,703$837
Other clays (not including expanded clays of heading 68.06), andalusite, ky ...$60,844$232,601$450,675$1,894,566$1,261,296
Chalk.$149,473$56,693  $104,565
Natural calcium phosphates$59,715,488$64,784,798$46,952,245$388,876,557$202,494,506
Siliceous fossil meals    $90,907
Pumice stone; emery; other natural abrasives $3,708 $244,480$14,811
Marble, travertine, ecaussine and other stone$231,896$202,149 $847,405$3,399,204
Granite, porphyry, basalt, sandstone and other stone$365,109$133,343$193,649 $486,632
Pebbles, gravel, broken or crushed stone$1,434,685$395,808$72,423 $22,616
Natural magnesium carbonate (magnesite) $10,388  $1,251
Gypsum; anhydrite; plasters$673,980$722,194$333,459$709,402$845,772
Limestone flux; limestone $2,280   
Quicklime, slaked lime and hydraulic lime $10,062  $17,152
Portland cement, aluminous cement, slag cement$37,471$1,564  $266,282
Asbestos. $12,192  $86,454
Mica, including splitings; mica waste.$68,261    
Natural steatite, whether or not roughly trimmed $50,680   
Mineral substances$84,845$53,646  $27,658
Total$69,365,518$67,253,185$48,323,728$393,072,350$209,160,976