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| Chapter | 2005 | 2009 | 2010 | 2011 |
| Optical, photographic, cinematographic, measuring, checking, precision, med ... | $429,976 | $465,148 | $465,459 | $829,773 |
| Clocks and watches and parts thereof | $26,675 | $54,125 | $226,270 | $508,593 |
| Musical instruments; parts and accessories of such articles | $2,879 | $7,792 | $9,763 | $2,358 |
| Total | $459,530 | $527,065 | $701,492 | $1,340,724 |
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