> Glassdoor sifted through the resumes for the job titles that appeared most frequently in the five years following graduation. Median pay was determined based on salary information self-reported to the site from May 2015 to this month.

I'm not sure if this is a good way to quantify it. It was always common for people to get low end jobs after graduation. It's not the jobs they've done in the last 5 years that are of interest, it's the ones they hold after 5 years.