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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 ... | $3,562,668 | $1,216,609 | $7,779,988 | $43,048,728 | $247,562,615 | $112,901,730 | $205,372,807 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $39,912,158 | $3,177,853 | $68,830,386 | $61,774,509 | $143,495,414 | $54,763,560 | $38,618,058 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $204,764 | $61,627 | $145,494 | $1,021,682 | $244,967 | $372,344 | $745,172 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $4,806,738 | $5,414,432 | $9,717,521 | $15,259,796 | $8,604,888 | $6,144,832 | $10,115,642 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $2,365,086 | $5,187,498 | $9,599,692 | $13,399,622 | $6,280,601 | $8,566,424 | $26,447,788 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $3,301,831 | $6,150,386 | $15,238,072 | $6,036,880 | $5,205,264 | $34,512,415 | $5,820,604 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $220,192 | $330,892 | $718,674 | $1,131,196 | $789,782 | $1,782,484 | $142,249 |
| Total | $54,373,437 | $21,539,297 | $112,029,827 | $141,672,413 | $412,183,531 | $219,043,789 | $287,262,320 |
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