Cash flow distribution over the construction time

[Valasai]

I want to input cash flow be distributed over the construction time.

For example: The construction time for nuclear power plants is assumed to be six years with the following cash flows.

Year 1: 5%; Year 2: 15%; Year 3: 25%; Year 4: 30%; Year 5: 20%; Year 6: 5%

How can I do this?