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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $73,517,720 | $33,586,877 | $89,651,687 | $110,283,341 | $69,522,297 | $90,687,059 | $131,361,655 |
| Articles of iron or steel | $59,166,320 | $53,598,635 | $75,548,203 | $76,363,220 | $64,496,160 | $72,135,468 | $95,081,576 |
| Copper and articles thereof | $1,079,490 | $1,277,911 | $1,927,326 | $2,048,095 | $1,601,382 | $1,763,762 | $3,309,235 |
| Nickel and articles thereof | $520 | $331 | $8,146 | $168 | $315 | $155 | $1,993 |
| Aluminum and articles thereof | $10,499,000 | $14,748,025 | $19,170,612 | $17,876,043 | $16,658,613 | $20,113,162 | $25,153,282 |
| Lead and articles thereof | $62,800 | $42,764 | $59,251 | $140,244 | $74,979 | $154,239 | $147,025 |
| Zinc and articles thereof | $526,450 | $1,743,158 | $1,399,424 | $1,082,590 | $436,531 | $891,032 | $1,084,775 |
| Tin and articles thereof | $41,950 | $18,236 | $26,842 | $98,722 | $70,924 | $78,966 | $71,505 |
| Other base metals; cermets; articles thereof | $910 | $3,091 | $6,474 | $20,895 | $8,082 | $12,102 | $7,184 |
| Tools, implements, cutlery, spoons and forks, of base metal | $12,262,620 | $12,755,642 | $12,444,322 | $15,591,972 | $14,079,323 | $17,367,880 | $22,082,577 |
| Miscellaneous articles of base metal | $12,005,110 | $13,024,947 | $14,861,956 | $15,820,871 | $14,243,578 | $16,519,050 | $19,728,953 |
| Total | $169,162,890 | $130,799,617 | $215,104,243 | $239,326,161 | $181,192,184 | $219,722,875 | $298,029,760 |
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