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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 ... | $20,203,767 | $5,490,623 | $2,231,145 | $2,589,590 | $428,785 | $62,298 | $121,375 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $46,354 | $189,401 | $176,148 | $537,123 | $852,521 | $261,167 | $275,773 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $20,380 | $152,726 | $181,809 | $989,493 | $72,385 | $150,653 | $260,051 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $1,220 | | $1,822 | | | | |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $1,949,528 | $2,314,711 | $3,649,151 | $5,931,752 | $2,560,700 | $2,093,173 | $2,345,245 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $18,247 | $84,343 | $2,112,102 | $516,231 | $123,695 | $30,194 | $11,292 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $741,714 | $5,346,548 | $5,520,630 | $3,878,156 | $1,848,911 | $1,999,360 | $632,295 |
| Total | $22,981,210 | $13,578,352 | $13,872,807 | $14,442,345 | $5,886,997 | $4,596,845 | $3,646,031 |
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