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| Commodity | 2006 | 2007 | 2008 | 2009 |
| Roller chain of iron/steel | $52,604 | $6,418 | | $35 |
| Articulated link chain other than roller chain, of iron/steel | $437,530 | $73,497 | $48,527 | $1,954 |
| Parts of articulated link chain of iron/steel | $689 | | $2,308 | $1,801 |
| Skid chain of iron/steel | $54,806 | $532,706 | $2,796 | $299 |
| Stud-link chain of iron/steel | | | $1,238 | |
| Welded link chain of iron/steel | $15,792 | $212 | $15,493 | $29,389 |
| Chain, of iron/steel, n.e.s. in 73.15 | $83,619 | $13,049 | $3,337 | $83 |
| Parts of chains (excl. articulated link chain), of iron/steel | $4,136 | $1,436 | $3,161 | $383 |
| Total | $649,176 | $627,318 | $76,860 | $33,944 |
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