7.	INTANGIBLE ASSETS

The evolution of the Group’s intangible assets for the years ended December 31, 2018, 2017 and 2016 is as follows:


	Service concession			Exploration rights			Other intangibles			Total
Cost		9,527			2,990			4,260			16,777
Accumulated amortization		5,553			155			3,710			9,418

Balance as of December 31, 2015		3,974			2,835			550			7,359

Cost
Increases		642			75			171			888
Translation effect		2,127			612			936			3,675
Decreases and reclassifications		(547	)		(584	)		127			(1,004	)
Accumulated amortization
Increases		437			—			280			717
Translation effect		1,245			—			848			2,093
Decreases and reclassifications		—			(6	)		—			(6	)
Cost		11,749			3,093			5,494			20,336
Accumulated amortization		7,235			149			4,838			12,222

Balance as of December 31, 2016		4,514			2,944			656			8,114

Cost
Increases		947			8			198			1,153
Translation effect		2,141			513			953			3,607
Decreases and reclassifications		(13	)		(149	)		185			23
Accumulated amortization
Increases		615			—			223			838
Translation effect		1,330			—			885			2,215
Decreases and reclassifications		—			(149	)		17			(132	)
Cost		14,824			3,465			6,830			25,119
Accumulated amortization		9,180			—			5,963			15,143

Balance as of December 31, 2017		5,644			3,465			867			9,976

Cost
Increases		1,303			276			765			2,344
Translation effect		15,544			3,414			6,636			25,594
Adjustment for inflation⁽¹⁾		—			—			591			591
Decreases and reclassifications		31			(248	)		(100	)		(317	)
Accumulated amortization
Increases		1,190			—			559			1,749
Translation effect		9,740			—			6,243			15,983
Adjustment for inflation⁽¹⁾		—			—			58			58
Decreases and reclassifications		—			—			(4	)		(4	)
Cost		31,702			6,907			14,722			53,331
Accumulated amortization		20,110			—			12,819			32,929

Balance as of December 31, 2018		11,592			6,907			1,903			20,402

(1)	Corresponds to adjustment for inflation of opening balances of intangible assets in subsidiaries with the Peso as functional currency which was charged to other comprehensive income.