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| Commodity | 2005 | 2006 | 2010 |
| Roller chain of iron/steel | $517,738 | $616,542 | $1,040,413 |
| Articulated link chain other than roller chain, of iron/steel | $4,574,328 | $2,849,528 | $7,526,788 |
| Parts of articulated link chain of iron/steel | $260,078 | $59,629 | $421,269 |
| Skid chain of iron/steel | $546,153 | $664,493 | $1,692,026 |
| Stud-link chain of iron/steel | $28,514 | $34,571 | $146,592 |
| Welded link chain of iron/steel | $870,410 | $779,183 | $1,359,565 |
| Chain, of iron/steel, n.e.s. in 73.15 | $2,078,684 | $366,026 | $4,064,258 |
| Parts of chains (excl. articulated link chain), of iron/steel | $197,828 | $9,794 | $286,912 |
| Total | $9,073,733 | $5,379,766 | $16,537,823 |
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