13.	Bank loans

The movement of bank loans for the years 2017, 2016 and 2015 is presented below:

	2017		2016		2015
	US$(000)		US$(000)		US$(000)

Beginning balance		55,000		285,302		40,000

New loans		341,215		200,500		344,503
Disbursements		(300,000)		(442,957)		(90,000)
Exchange difference		-		12,155		(9,201)

Final balance		96,215		55,000		285,302

As of December 31, 2017 and 2016, bank loans were obtained for working capital purposes, have current maturity and accrue interest at market annual rates ranging from 1.15% to 6.85% as of December 31, 2017 (1.92% to 4.14% as of December 31, 2016).