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| Commodity | 2005 | 2006 | 2007 |
| Roller chain of iron/steel | $667,491 | $405,261 | $290,697 |
| Articulated link chain other than roller chain, of iron/steel | $283,287 | $51,190 | $86,652 |
| Parts of articulated link chain of iron/steel | $94,665 | $50,722 | $15,322 |
| Skid chain of iron/steel | $49,518 | $55,145 | $23,814 |
| Stud-link chain of iron/steel | $102,156 | $12,567 | $16,895 |
| Welded link chain of iron/steel | $17,996 | $37,396 | $17,968 |
| Chain, of iron/steel, n.e.s. in 73.15 | $42,402 | $195,587 | $129,836 |
| Parts of chains (excl. articulated link chain), of iron/steel | $281,885 | $132,836 | $385,318 |
| Total | $1,539,400 | $940,704 | $966,502 |
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