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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $1,842,903 | $187,802 | $5,883,547 | $79,587,650 | $51,719,868 | $20,047,824 | $11,388,092 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $911,502 | $1,577,183 | $12,500,399 | $10,903,732 | $1,793,814 | $3,652,328 | $12,042,428 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $27,722 | | $436,483 | $2,933,263 | $5,502,178 | $3,986,323 | $3,603,675 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | | $28,184 | $64,811 | $115,481 | $3,655 | $646,887 | $1,477,890 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $19,698,806 | $68,866,886 | $10,428,889 | $90,942,590 | $4,743,705 | $3,850,174 | $3,348,442 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $328,452 | $1,765,751 | $310,891 | $5,945,875 | $2,923,050 | $1,015,961 | $2,263,686 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $2,310 | $10,479 | $15,092 | $3,472,436 | $642,973 | $242,373 | $9,538 |
| Total | $22,811,695 | $72,436,285 | $29,640,112 | $193,901,027 | $67,329,243 | $33,441,870 | $34,133,751 |
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