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Other operating income and expenses
 12 Months Ended
Dec. 31, 2017
Other operating income and expenses [Abstract]  
Other operating income and expenses
Note 20.- Other operating income and expenses

The table below shows the detail of Other operating income and expenses for the years ended December 31, 2017, 2016 and 2015:

 
For the twelve-month year ended December 31,
 
Other operating income
2017
  
2016
 
2015
 
     
Grants
  
59,707
   
59,085
   
67,859
 
Income from various services and insurance proceeds
  
21,137
   
6,453
   
998
 
Total
  
80,844
   
65,538
   
68,857
 

  
For the twelve-month year ended December 31,
 
Other operating expenses
 
2017
  
2016
  
2015
 
Leases and fees
  
(6,641
)
  
(5,309
)
  
(3,865
)
Operation and maintenance
  
(129,873
)
  
(133,292
)
  
(116,405
)
Independent professional services
  
(36,178
)
  
(30,515
)
  
(19,046
)
Supplies
  
(20,350
)
  
(17,177
)
  
(18,001
)
Insurance
  
(24,289
)
  
(23,390
)
  
(20,277
)
Levies and duties
  
(52,409
)
  
(44,440
)
  
(32,352
)
Other expenses
  
(14,721
)
  
(6,195
)
  
(14,882
)
Total
  
(284,461
)
  
(260,318
)
  
(224,828
)

Grants income mainly relate to ITC cash grants and implicit grants recorded for accounting purposes in relation to the FFB loans with interest rates below market rates in Solana and Mojave projects (See Note 16).

Residual increase in other operating income relates primarily to insurance proceeds from claims in some assets of the Company.

The Company changed the presentation of “Other operating expenses” in 2016 to better reflect the nature of its business and costs. Prior years amounts have been reclassified to conform to the new classification presented in the table above.