Date Calulation

Hi All!

I need a help to find the below example.

If i entered 01.01.2000 date i want to add after 10, 15, 20 years.

answer should come like this 10 years : 01.01.2010

15 years : 01.01.2015

20 years : 01.01.2020.

Could any body give any FM or some logic.

Thank you.