Your cumulative rating is the number you used to see by your name in the top right of your app. Now, you can see how many 1-star or 5-star ratings you've gotten.
Here's how it works:
Head to settings, privacy, privacy center, then swipe right to find where it says "Would you like to see a summary of how you use Uber?"
Click "see summary" then scroll down to "ratings" and click "view my ratings."
Drivers can now also see a breakdown of their ratings from passengers.