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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $34,780,166 | $63,169,194 | $59,496,117 | $141,347,163 | $217,000,436 | $100,759,764 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $4,875,713 | $4,576,695 | $8,767,675 | $10,018,236 | $4,981,092 | $6,961,613 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $8,060,714 | $7,231,253 | $14,491,095 | $18,141,569 | $8,560,337 | $3,911,018 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $689,959 | $1,874,397 | $11,547,034 | $20,911,724 | $21,913,459 | $12,824,163 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $14,057,766 | $22,843,273 | $19,469,235 | $40,047,896 | $26,014,387 | $31,939,099 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $17,068,724 | $8,410,917 | $9,614,522 | $8,080,601 | $4,358,979 | $7,643,058 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $2,049,987 | $15,907,250 | $26,102,638 | $30,851,866 | $21,165,807 | $13,408,827 |
| Total | $81,583,029 | $124,012,979 | $149,488,316 | $269,399,055 | $303,994,497 | $177,447,542 |
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