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| Commodity | 2005 | 2006 | 2007 | 2008 |
| Roller chain of iron/steel | $70,564 | $87,607 | $230,382 | $366,602 |
| Articulated link chain other than roller chain, of iron/steel | $139,549 | $189,624 | $181,970 | $277,395 |
| Parts of articulated link chain of iron/steel | $57,345 | $154,554 | $96,269 | $100,752 |
| Skid chain of iron/steel | $12,300 | $32,842 | $71,023 | $100,916 |
| Stud-link chain of iron/steel | $34,661 | $144,737 | $725,117 | $91,982 |
| Welded link chain of iron/steel | $330,530 | $268,029 | $542,582 | $316,082 |
| Chain, of iron/steel, n.e.s. in 73.15 | $242,890 | $438,106 | $749,359 | $750,565 |
| Parts of chains (excl. articulated link chain), of iron/steel | $71,080 | $221,892 | $151,661 | $59,149 |
| Total | $958,919 | $1,537,391 | $2,748,363 | $2,063,443 |
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