Commodity200520062007200820092010
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... $1,727   $871
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ...  $974,638  $990
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ...$766,607$61,921 $281,732$676 
Casing of a kind used in drilling for oil/gas, having circular cross-sectio ...$52,832$1,129,423$732,451  $46,856
Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ...$3,524$53,244 $1,132,045 $30,262
Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... $517,638$2,865 $2,129 
Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ...$14,493$16,383 $6,997$18,805$762
Total$837,456$1,780,336$1,709,954$1,420,774$21,610$79,741