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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 ... | $231,789,215 | $78,494,164 | $277,461,133 | $186,005,738 | $394,163,153 | $38,557,587 | $67,175,720 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $15,808,478 | $27,657,207 | $15,161,987 | $23,057,434 | $17,689,697 | $5,401,482 | $10,335,869 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $1,581,705 | $4,176,362 | $4,642,501 | $3,455,169 | $3,092,047 | $4,447,429 | $8,836,738 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $2,021,982 | $2,406,874 | $246,390 | $2,310,065 | $2,426,582 | $4,280,042 | $17,028,983 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $34,002,326 | $43,859,850 | $55,754,710 | $54,777,964 | $68,949,673 | $96,476,476 | $22,883,274 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $1,022,792 | $2,916,317 | $1,377,967 | $1,648,946 | $2,307,606 | $3,711,884 | $415,095 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $10,475,769 | $6,620,041 | $13,206,077 | $9,031,458 | $12,500,609 | $20,412,473 | $21,982,554 |
| Total | $296,702,267 | $166,130,815 | $367,850,765 | $280,286,774 | $501,129,367 | $173,287,373 | $148,658,233 |
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