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| Commodity | 2005 | 2007 | 2008 |
| Roller chain of iron/steel | $763,323 | $2,201,451 | $1,969,730 |
| Articulated link chain other than roller chain, of iron/steel | $178,168 | $177,629 | $252,503 |
| Parts of articulated link chain of iron/steel | $240,791 | $495,253 | $772,454 |
| Skid chain of iron/steel | $2,270,267 | $27,380 | $127,269 |
| Stud-link chain of iron/steel | $38,882 | $59,095 | $566,071 |
| Welded link chain of iron/steel | $741,988 | $297,681 | $176,167 |
| Chain, of iron/steel, n.e.s. in 73.15 | $1,675,485 | $979,220 | $848,540 |
| Parts of chains (excl. articulated link chain), of iron/steel | $189,231 | $1,292,025 | $1,192,357 |
| Total | $6,098,135 | $5,529,734 | $5,905,091 |
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