3. Materials and services
2017 2016
Purchases during the financial period -1 114.8 -1 148.2
Increase/decrease in inventories -3.2 -4.2
Work performed for own use and capitalised 0.0 0.0
Materials and supplies -1 118.0 -1 152.4
External services -153.3 -153.2
Materials and services -1 271.3 -1 305.7