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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Roller chain of iron/steel | $5,468,718 | $11,343,627 | $17,956,334 | $21,029,348 | $21,274,971 | $18,443,220 |
| Articulated link chain other than roller chain, of iron/steel | $1,880,601 | $1,704,683 | $1,740,500 | $2,216,696 | $5,017,251 | $4,610,930 |
| Parts of articulated link chain of iron/steel | $1,094,976 | $1,616,083 | $1,263,094 | $1,639,921 | $2,220,667 | $2,926,820 |
| Skid chain of iron/steel | $188,462 | $102,013 | $56,204 | $359,925 | $453,911 | $411,290 |
| Stud-link chain of iron/steel | $213,781 | $95,532 | $309,389 | $1,372,872 | $1,337,507 | $1,202,870 |
| Welded link chain of iron/steel | $2,312,259 | $2,860,452 | $3,881,892 | $5,593,548 | $6,453,835 | $20,308,630 |
| Chain, of iron/steel, n.e.s. in 73.15 | $6,036,503 | $1,959,961 | $4,979,470 | $5,511,597 | $6,102,062 | $11,849,920 |
| Parts of chains (excl. articulated link chain), of iron/steel | $1,731,236 | $2,243,421 | $2,128,413 | $7,979,660 | $7,236,431 | $16,074,950 |
| Total | $18,926,536 | $21,925,772 | $32,315,296 | $45,703,567 | $50,096,635 | $75,828,630 |
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