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| Commodity | 2005 | 2006 | 2008 | 2009 | 2010 | 2011 |
| Articulated link chain other than roller chain, of iron/steel | $1,742 | $309,046 | | | | $19,789 |
| Welded link chain of iron/steel | | $6,104 | $625 | $12,138 | $6,254 | |
| Chain, of iron/steel, n.e.s. in 73.15 | $170,971 | $5,058 | $91,854 | | $119,330 | $353,031 |
| Parts of chains (excl. articulated link chain), of iron/steel | | $962 | | | | $4,241 |
| Total | $172,713 | $321,170 | $92,479 | $12,138 | $125,584 | $377,061 |
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