pre_text: GasLog Ltd. and its Subsidiaries
  Notes to the consolidated financial statements (Continued)
  For the years ended December 31, 2017, 2018 and 2019
  (All amounts expressed in thousands of U.S. Dollars, except share and per share data) 19. Financial Income and Costs An analysis of financial income and costs is as follows:
table: For the year ended December 31,
table: 2017 2018 2019
table: Financial Income
table: Interest income 2,650 4,784 5,318
table: Total financial income 2,650 4,784 5,318
table: Financial Costs
table: Amortization and write-off of deferred loan/bond issuance costs/premium 12,398 12,593 14,154
table: Interest expense on loans and realized loss on cash flow hedges 85,813 111,600 122,819
table: Interest expense on bonds and realized loss on CCSs 27,085 30,029 34,607
table: Lease charge 10,875 10,520 10,506
table: Loss arising on bond repurchases at a premium (Note 13)13) 1,459 — 2,119
table: Other financial costs, including unrealized foreign exchange losses on cash and bonds 1,551 1,885 6,276
table: Total financial costs 139,181 166,627 190,481
question: Analyse this data from a financial earnings document. What was the percentage change in total financial costs from 2017 to 2019?