pre_text: 9. Net interest income/interest expenses The interest result can be broken down as follows: Interest income and interest expenses from financial instruments are assigned to the measurement categories according to IFRS 9 on the basis of the underlying transactions. The interest expenses included here (of the measurement categories in accordance with IFRS 9) primarily include interest expenses for issued bonds (including the Commercial Paper Programme) of €41 million (2017/18: €55 million) and for liabilities to banks of €19 million (2017/18: €12 million). The decline in interest expenses was primarily the result of more favourable refinancing terms.
table: € million 2017/2018 2018/2019
table: Interest income 27 29
table: thereof finance leases (0) (0)
table: thereof from post-employment benefits plans (5) (7)
table: thereof from financial instruments of the measurement categories according to IFRS 9 (previous year: IAS39): (16) (12)
table: Interest expenses −163 −148
table: thereof finance leases (−51) (−49)
table: thereof from post-employment benefits plans (−16) (−15)
table: thereof from financial instruments of the measurement categories according to IFRS9 (previous year: IAS39) (−79) (−69)
table: Interest result −136 −119
question: Analyse this data from a financial earnings document. What was the change in interest income in 2018/2019 from 2017/2018?