Index Start with Zero

Hello,

I am trying to display a list using index of the repeat region for numeration. When I write: {{$index+’ - '+data_description}} the number start with 0. So, for the record of 15; I have the start number of 0 and end number of 14.
Is there any way I can make the number start with 1. That way I can the start number can 1 and ending number of 15.

Thank you for your help in advance.