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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $24,023,238 | $113,774,391 | $12,137,578 | $1,372,430 | $23,762,399 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $1,889,780 | $153,164 | $8,912 | $160,269 | $119,406 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $15,885,422 | $12,348,985 | $1,068,561 | $7,058,544 | $5,310,746 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $1,359,172 | $4,552,805 | $10,620,085 | $2,767,757 | $881,022 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $510,859 | | $186,998 | $22,072 | $1,573,811 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $962,315 | $135,439 | $223,776 | $80,538 | $1,017,640 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $1,633,448 | $8,082,664 | $4,819,429 | $161,246 | $1,346,367 |
| Total | $46,264,234 | $139,047,448 | $29,065,339 | $11,622,856 | $34,011,391 |
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