12.- TRADE RECEIVABLES

This item reflects different accounts receivable from the Group’s operations. The breakdown at 31 December 2017 and 2016 is as follows:

	Thousands of Euros
	2017	2016
Trade receivables for services provided	141.738	159.885
Provision for bad debts	(9.156)	(13.688)
Total	132.582	146.197

As a general rule, these receivables do not accrue interest and are due at less than 90 days with no restrictions on how they may be availed.

Movements in the provision for bad debts during the years ending 31 December 2017 and 2016 were as follows:

	Thousands of Euros
	2017	2016
Balance at 1 January	13.688	12.254
Changes in scope/td>	-	58
Exchange differences	(209)	(7)
Additions	1.982	2.830
Applications	(6.305)	(1.447)
Balance at 31 December	9.156	13.688

The analysis of the ageing of financial assets in arrears but not considered impaired at 31 December 2017 and 2016 is as follows:

	Thousands of Euros
	2017	2016
Less than 30 days	19.928	18.380
From 31 to 60 days	8.728	11.488
More than 60 days	21.813	32.122
Total	50.469	61.990