Combine Different Years Employee Data into 1 Pivot Chart/Graph

Hello,

I have 3 different years of employee ratings and 1 group of employees. I’d like to combine the 3 years of ratings together and create 1 graph (to create an easy way to compare the years).

Do I have to create 3 pivot table worksheets first and then combine into 1 Chart? Or can I to combine the data into 1 pivot table first, then create a pivot chart?

What is the best approach and how do I do it?

Thank you.

Brandy