Glassdoor doesn't show how many years of experience, years at the company, or education are tied to each salary. Maybe those people listed on Glassdoor started

Glassdoor doesn't show how many years of experience, years at the company, or education are tied to each salary. Maybe those people listed on Glassdoor started at your salary or even lower. That is very likely because lots of times people post on Glassdoor after leaving the company, and typically they have gotten a raise since joining. It is also possible that people are inflating the salary they post.