38. Financial expenses

 31.12.201631.12.2015
Interest expense (92 003) (53 444)
- interest expense on loans and borrowings (30 067) (24 644)
- interest expense on bonds (49 818) (22 540)
- finance lease cost (81) (118)
- other interest (12 037) (6 142)
Foreing exchange differences (2 081) (121)
Discounting liabilities due to employee benefits and provisions (26 635) (17 317)
Change in fair value of financial instruments (5 647) (8 629) 
Costs of unused bonds (120) -
Other finance costs (524) (2 240)
Total (127 010) (81 751)