Commodity2005200620072008200920102011
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ...$453,133,299$590,357,831$561,577,810$658,514,340$631,212,640$295,313,577$660,932,964
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ...$14,949,005$46,368,223$31,036,516$51,825,800$13,074,078$5,701,350$9,439,885
Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ...$44,503$464,977$540,020$70,600$84,218  
Casing of a kind used in drilling for oil/gas, having circular cross-sectio ...   $731,680   
Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ...$3,327,264$5,103,773$44,857,272$45,903,320$26,252,672$32,253,769$56,321,448
Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ...$958,938$3,904,635$7,134,799$4,228,450$4,128,162$2,292,483$1,264,442
Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... $56,529$37$39,820$224,221$35,871 
Total$472,413,009$646,255,968$645,146,454$761,314,010$674,975,991$335,597,050$727,958,739