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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Roller chain of iron/steel | $6,690,693 | $6,791,857 | $10,669,512 | $13,158,688 | $14,754,826 | $15,056,777 |
| Articulated link chain other than roller chain, of iron/steel | $1,010,584 | $32,448 | $478 | $27,400 | | $13,603 |
| Parts of articulated link chain of iron/steel | $698,209 | $467,309 | $653,435 | $1,168,471 | $850,009 | $1,157,537 |
| Skid chain of iron/steel | $3,345 | | | $9,000 | | |
| Stud-link chain of iron/steel | | | | | $155,098 | |
| Welded link chain of iron/steel | $9,200 | $135,038 | $105,955 | $209,827 | $58,239 | $1,610 |
| Chain, of iron/steel, n.e.s. in 73.15 | $17,555 | $231,138 | $334,973 | $80,598 | $12,618 | $1,686 |
| Parts of chains (excl. articulated link chain), of iron/steel | $2,747 | $1,050,915 | $64,136 | $28,834 | $10,644 | $1,553 |
| Total | $8,432,333 | $8,708,705 | $11,828,489 | $14,682,818 | $15,841,434 | $16,232,766 |
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