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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Roller chain of iron/steel | $14,270,893 | $20,540,808 | $18,006,656 | $24,238,139 | $15,981,073 | $20,146,725 | $22,384,112 |
| Articulated link chain other than roller chain, of iron/steel | $7,765,668 | $11,678,173 | $20,686,303 | $24,456,666 | $8,219,472 | $10,704,008 | $10,659,276 |
| Parts of articulated link chain of iron/steel | $1,918,041 | $952,631 | $1,425,122 | $2,788,004 | $2,267,800 | $2,768,378 | $2,730,989 |
| Skid chain of iron/steel | $90,289 | $241,655 | $112,944 | $556,016 | $3,932,184 | $506,546 | $6,786,770 |
| Stud-link chain of iron/steel | $5,706,699 | $7,224,927 | $3,087,680 | $6,195,433 | $4,270,257 | $4,440,453 | $4,723,932 |
| Welded link chain of iron/steel | $864,664 | $915,723 | $3,985,861 | $1,564,279 | $4,385,449 | $3,843,588 | $2,814,811 |
| Chain, of iron/steel, n.e.s. in 73.15 | $7,897,567 | $11,332,733 | $12,714,927 | $13,587,498 | $15,959,687 | $15,398,755 | $21,791,831 |
| Parts of chains (excl. articulated link chain), of iron/steel | $2,681,116 | $3,081,596 | $5,304,521 | $4,962,064 | $3,443,311 | $5,391,490 | $10,877,192 |
| Total | $41,194,937 | $55,968,246 | $65,324,014 | $78,348,099 | $58,459,233 | $63,199,943 | $82,768,913 |
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