20. COSTS
2017 | 2016 | 2015 | ||||||||||
Inventories at beginning of year |
21,820 | 19,258 | 13,001 | |||||||||
Purchases for the year |
66,075 | 48,760 | 33,886 | |||||||||
Production costs(1) |
147,423 | 127,075 | 85,550 | |||||||||
Translation effect |
3,877 | 4,031 | 6,358 | |||||||||
Reclassifications and other movements |
(92 | ) | — | — | ||||||||
Inventories at end of year |
(27,291 | ) | (21,820 | ) | (19,258 | ) | ||||||
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211,812 | 177,304 | 119,537 | ||||||||||
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(1) | See Note 21. |