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| Commodity | 2005 | 2007 | 2008 |
| Roller chain of iron/steel | $3,114,970 | $3,451,875 | $3,224,589 |
| Articulated link chain other than roller chain, of iron/steel | $1,470,349 | $1,514,741 | $1,488,597 |
| Parts of articulated link chain of iron/steel | $1,528,885 | $498,596 | $2,227,744 |
| Skid chain of iron/steel | $1,111,560 | $188,116 | $559,926 |
| Stud-link chain of iron/steel | $567,955 | $758,571 | $4,181,898 |
| Welded link chain of iron/steel | $2,451,786 | $11,168,748 | $4,437,759 |
| Chain, of iron/steel, n.e.s. in 73.15 | $1,826,423 | $6,339,188 | $3,547,155 |
| Parts of chains (excl. articulated link chain), of iron/steel | $4,706,499 | $6,856,319 | $7,493,891 |
| Total | $16,778,427 | $30,776,154 | $27,161,559 |
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