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| Chapter | 2005 | 2006 | 2007 |
| Optical, photographic, cinematographic, measuring, checking, precision, med ... | $134,899,924 | $149,897,583 | $142,804,528 |
| Clocks and watches and parts thereof | $4,262,195 | $4,713,666 | $4,555,504 |
| Musical instruments; parts and accessories of such articles | $167,831 | $210,098 | $327,603 |
| Total | $139,329,950 | $154,821,347 | $147,687,635 |
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