pre_text: (1) No dividend is proposed by the Board of Directors related to the financial year 2019. (2) Includes net sales to other segments.
  The figures are derived from our consolidated financial
  statements prepared in accordance with IFRS. Year-on-year
  change is in parenthesis. All Nokia Technologies IPR and Licensing net sales are allocated to Finland.
table: Financial highlights
table: For the year ended December 31, 2019 2018 2017
table: Continuing operations EURm EURm EURm
table: Net sales 23,315 22,563 23,147
table: Gross profit 8,326 8,446 9,139
table: Gross margin 35.7% 37.4% 39.5%
table: Operating profit/(loss) 485 (59) 16
table: Operating margin 2.1% (0.3)% 0.1%
table: Profit/(loss) for the year 18 (549) (1,437)
table: EUR EUR EUR
table: Earnings per share, diluted 0.00 (0.10) (0.26)
table: Dividend per share(1) 0.00 0.10 0.19
table: 2019 2018 2017
table: As of December 31 EURm EURm EURm
table: Net cash and current financial investments 1,730 3,053 4,517
question: Analyse this data from a financial earnings document. What is the increase / (decrease) in Gross profit from 2018 to 2019?