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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $42,967,418 | $48,880,450 | $60,589,447 | $66,334,502 | $48,855,615 | $38,157,591 | $45,046,282 |
| Articulated link chain other than roller chain, of iron/steel | $11,001,590 | $10,480,838 | $13,107,245 | $16,981,538 | $17,630,535 | $43,671,924 | $55,659,156 |
| Parts of articulated link chain of iron/steel | $5,176,048 | $5,195,854 | $7,566,305 | $9,350,762 | $7,021,649 | $9,464,504 | $9,658,439 |
| Skid chain of iron/steel | $4,222,958 | $6,023,124 | $3,282,300 | $2,804,196 | $2,560,526 | $3,616,130 | $5,559,655 |
| Stud-link chain of iron/steel | $2,028,115 | $1,795,137 | $2,686,766 | $5,146,681 | $2,878,681 | $2,549,053 | $2,540,523 |
| Welded link chain of iron/steel | $9,716,288 | $12,383,934 | $21,609,390 | $21,906,951 | $16,121,728 | $17,127,570 | $16,153,051 |
| Chain, of iron/steel, n.e.s. in 73.15 | $4,818,950 | $7,837,091 | $9,373,491 | $9,743,143 | $7,808,007 | $8,502,147 | $9,474,787 |
| Parts of chains (excl. articulated link chain), of iron/steel | $63,176,401 | $63,341,973 | $69,130,013 | $61,627,406 | $29,000,771 | $63,852,260 | $54,331,851 |
| Total | $143,107,768 | $155,938,401 | $187,344,957 | $193,895,179 | $131,877,512 | $186,941,179 | $198,423,744 |
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