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) 16. Voyage Expenses and Commissions An analysis of voyage expenses and commissions is as follows: Bunkers’ consumption and other voyage expenses represents mainly bunkers consumed during vessels’ unemployment and off-hire.
table: For the year ended December 31,
table: 2017 2018 2019
table: Brokers’ commissions on revenue 6,456 7,555 7,527
table: Bunkers’ consumption and other voyage expenses 8,948 12,819 16,245
table: Total 15,404 20,374 23,772
question: Analyse this data from a financial earnings document. What was the change in bunkers’ consumption and other voyage expenses from 2018 to 2019?