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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 |
| Roller chain of iron/steel | $3,408,684 | $1,391,919 | $713,233 | $4,825,371 | $18,234,311 |
| Articulated link chain other than roller chain, of iron/steel | $4,550,876 | $3,314,419 | $3,473,229 | $16,307,966 | $6,466,930 |
| Parts of articulated link chain of iron/steel | $383,177 | $2,338,273 | $3,960,417 | $2,593,713 | $1,487,103 |
| Skid chain of iron/steel | $3,927,722 | $50,619 | $530,366 | $35,073 | |
| Stud-link chain of iron/steel | $621,910 | $295,885 | $2,501,171 | $11,307,758 | $168,923 |
| Welded link chain of iron/steel | $230,701 | $954,761 | $361,410 | $1,127,984 | $670,505 |
| Chain, of iron/steel, n.e.s. in 73.15 | $722,848 | $1,820,493 | $8,455,974 | $4,995,337 | $7,387,910 |
| Parts of chains (excl. articulated link chain), of iron/steel | $561,374 | $477,131 | $1,079,636 | $2,017,696 | $27,280,819 |
| Total | $14,407,292 | $10,643,500 | $21,075,436 | $43,210,898 | $61,696,501 |
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