I saw a user's Stack Overflow profile page and found an additional feature in it:
top 0.95% overall
When I click on the top 0.95% overall link, it redirects me to another page which shows the corresponding user's all time rank and all time reputation.
But when I see my Ask Ubuntu profile page, there was no such feature like the above. I also took a look at our mods' pages but it was still not there.
My question: Why is feature not enabled on Ask Ubuntu? What does the link actually refer to?