I'm applying to a top program, and one thing I'm not super confident about is my GPA. It's good (it satisfies the course's requirement) but not stellar. Even my referees probably won't say amazing things about how I ranked in their classes (I got A's in all of them while some classmates of mine got A+'s).
However, because all of my class participates in an exchange program, at the beginning of second year (I am studying in Europe, so our bachelors take three years) a ranking is released including a score (GPA + number of credits) and the university where we'll go on our exchange. I ranked pretty high on that one (top 6%), so I think that including it somewhere in the SOP couldn't hurt.
However, it's not an official class rank (my university doesn't do those), and I'm afraid it would come across as a little desperate (which I absolutely am). What do you think?