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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Roller chain of iron/steel | $2,712 | $19,501 | | $10,643 | $830 | $11,330 |
| Articulated link chain other than roller chain, of iron/steel | $2,414 | $14,803 | $46,245 | $121,311 | $21,117 | $90,122 |
| Parts of articulated link chain of iron/steel | $26,871 | $2,000 | $25,434 | | $41 | $580 |
| Stud-link chain of iron/steel | | $2,306 | | | | |
| Welded link chain of iron/steel | | $2,022 | | | | $37 |
| Chain, of iron/steel, n.e.s. in 73.15 | $4,668 | $35,519 | | | $41,045 | $25,143 |
| Parts of chains (excl. articulated link chain), of iron/steel | $65 | | | | | |
| Total | $36,730 | $76,151 | $71,679 | $131,954 | $63,033 | $127,212 |
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