Count Top Results using Star Rating

I'm trying to count the number of items in my SharePoint list that have a 5-star rating and return that result to a label in my PowerApp.  I haven't had any luck finding the "star-rating" field from my bound SharePoint list within PowerApps.  I figured it would looks something like this: 

 

CountIf(SPList, Rating = 5)

 

Anybody have a similar experience or a suggestion?  Thanks in advance.