Such data would be valuable for prospective students. I don't know how you'd get such data. Schools definitely won't give you accurate information. And this data just can't be right. How is it possible that a student graduating from the #1 school makes $22,000 more than one graduating from the #10 school? It doesn't make sense.
What I thought was informative was that there isn't any one good source for the information. By the way, a similar story was incredably popular on our sister site Design News, a site aimed at mostly mechanical engineers. Maybe this is a tougher crowd. I don't doubt that, but I also wonder would this information, if it could be gathered somewhat accurately, be of any value to students choosing a program. I doubt engineering students pick the job solely for the salary. Engineering is a hard profession unless you like it to begin with.