As an initial matter, the others are right and you should check before you include something that the school didnt give to you. At most schools at least a couple students will drop out in disgust or leave for other reasons after 1st semester. If and when that happens, you'll be 34 in a class of 132 or 133 and 26% wont be accurate anymore.
That being said, I'd put a percentage in if I could, and only for the stupidest reason - somehow I think 1/3 instictively comes to mind you look at 34/133 quickly and dont take a second to do the math in your head.
Regardless, "Top 26%" screams retarded. I think "26th Percentile" is maybe a better way of expressing it.