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| Sub-Chapter | 2005 | 2007 | 2008 |
| Sheet piling of iron or steel | $77,404,625 | $95,709,774 | $116,117,337 |
| Railway or tramway track construction material of iron or steel | $5,139,715 | $38,904,177 | $37,388,574 |
| Tubes, pipes and hollow profiles, of cast iron. | $40,854,047 | $86,573,215 | $143,803,643 |
| Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) ... | $187,749,822 | $628,251,376 | $588,703,864 |
| Other tubes and pipes (for example, welded, riveted or similarly closed) | $88,295,727 | $257,692,676 | $795,988,289 |
| Other tubes, pipes and hollow profiles | $178,794,112 | $408,297,847 | $501,474,244 |
| Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or ... | $153,322,790 | $341,694,394 | $423,660,067 |
| Structures (excluding prefabricated buildings of heading 94.06) | $317,141,773 | $703,383,302 | $1,379,652,879 |
| Reservoirs, tanks, vats and similar containers for any material | $12,156,873 | $44,956,625 | $100,531,710 |
| Tanks, casks, drums, cans, boxes and similar containers, for any material | $16,130,484 | $20,753,867 | $28,613,342 |
| Containers for compressed or liquefied gas, of iron or steel. | $10,546,445 | $84,436,381 | $37,405,561 |
| Stranded wire, ropes, cables, plaited bands, slings and the like, of iron o ... | $61,032,540 | $85,114,271 | $210,958,889 |
| Barbed wire of iron or steel; twisted hoop or single flat wire, barbed or n ... | $6,264,169 | $3,399,424 | $3,458,536 |
| Cloth (including endless bands), grill, netting and fencing, of iron or ste ... | $15,992,560 | $27,540,866 | $32,624,792 |
| Chain and parts thereof, of iron or steel. | $16,778,427 | $30,776,154 | $27,161,559 |
| Anchors, grapnels and parts thereof, of iron or steel. | $5,437,016 | $13,404,249 | $15,674,273 |
| Nails, tacks, drawing pins, corrugated nails, staples | $14,275,376 | $19,853,590 | $33,954,580 |
| Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pin ... | $77,288,645 | $146,953,383 | $195,029,304 |
| Sewing needles, knitting needles, bodkins, crochet hooks, embroidery stilet ... | $1,852,269 | $2,049,036 | $2,409,143 |
| Springs and leaves for springs, of iron or steel. | $8,555,194 | $11,711,428 | $14,306,156 |
| Stoves, ranges, grates, cookers | $44,185,615 | $50,278,879 | $57,320,090 |
| Radiators for central heating, not electrically heated, and parts thereof | $1,066,874 | $6,048,173 | $28,554,990 |
| Table, kitchen or other household articles and parts thereof, of iron or st ... | $86,062,285 | $125,311,195 | $169,588,690 |
| Sanitary ware and parts thereof, of iron or steel. | $31,765,453 | $58,422,267 | $81,767,417 |
| Other cast articles of iron or steel. | $37,249,458 | $53,769,578 | $81,774,612 |
| Other articles of iron or steel. | $97,492,864 | $146,142,860 | $224,695,066 |
| Total | $1,592,835,158 | $3,491,428,987 | $5,332,617,607 |
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