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Note 7. Evaluation tools at customers

The changes in the amount of evaluation tools are as follows:

December 31,
20142015
Balance at beginning of year13,33217,767
Evaluation tools shipped12,84515,651
Depreciation(3,448)(5,003)
Evaluation tools sold(4,814)(6,313)
Reclassification to purchased technology(1,391)
Reclassification from assets under construction4,659
Foreign currency translation effect1,2432,238
Balance at end of year17,76728,999
Useful lives in years:5

The gross carrying amount of the evaluation tools at customers per December 31, 2015 was €38,631 (2014: €23,133) accumulated depreciation per December 31, 2015 was €9,632 (2014: €5,366).