Commodity200520062007200820092010
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ...    $1,102 
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... $919    
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... $23,979$1,035$1,205$264 
Casing of a kind used in drilling for oil/gas, having circular cross-sectio ...$4,185  $23,596$134,212$42,789
Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ...   $144,798$11,650$177
Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... $227 $209$2,214 
Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ...$2,178$34,008$15,509$18,372 $61,385
Total$6,363$59,133$16,544$188,180$149,442$104,351