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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Line pipe (excl. seamless), of a kind used for oil/gas pipelines, of iron/s ... | $1,629,399 | $2,022,953 | $6,725,564 | $4,311,453 | $14,271,068 | $22,907,721 | $31,752,496 |
| Casing & tubing of a kind used in drilling for oil/gas, of iron/steel | $1,853,498 | $1,655,054 | $3,275,509 | $1,456,774 | $4,388,555 | $2,874,372 | $23,898,864 |
| Tubes, pipes & hollow profiles (excl. of 7306.10 & 7306.20), welded, of cir ... | $16,392,217 | $18,354,376 | $22,096,843 | $24,588,695 | $11,083,688 | $11,789,125 | $19,320,312 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.30), welded, of circu ... | $15,030,090 | $27,229,755 | $51,589,851 | $49,178,063 | $28,548,922 | $23,353,424 | $34,076,821 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.40), welded, of circu ... | $2,932,359 | $1,922,820 | $12,853,648 | $11,654,770 | $3,616,000 | $3,609,406 | $6,393,277 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.50), welded, of non-c ... | $22,208,988 | $30,371,691 | $43,861,164 | $31,213,347 | $19,558,125 | $31,554,729 | $38,288,213 |
| Tubes, pipes & hollow profiles of iron (excl. cast iron)/steel, n.e.s. (exc ... | $9,717,899 | $13,665,083 | $33,054,208 | $30,829,779 | $17,021,386 | $20,611,972 | $32,016,001 |
| Total | $69,764,450 | $95,221,732 | $173,456,787 | $153,232,881 | $98,487,744 | $116,700,749 | $185,745,984 |
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