How do you a rating on the profile page?

I have been coming here for a couple of months and have been rating pics but on my profile page it shows I have no average rating? Am I missing something?  Love the site- great job by someone! ;D

The average rating on your profile page is the average rating given by others to your images, not the average rating YOU give to other people's images. Since you haven't uploaded any pictures, no such number exists for you.