Formula field

Formula field

I'm new to ZC and am hoping there is an easy answer here. I created a form where people are rated "evident", "emerging" or "not evident" on a list of competencies. Each competency is a different field and they rating is selected using a radio button.

I am trying to create reports on how many evident / emerging / not evident ratings were assigned and am struggling to find the solution. I am trying to use a formula field to sum the number of each rating on the form and am struggling. I also tried using the pivot chart in reports and haven't found a solution. 

Thanks!

Kevin