what cities do girls from each sorority come from?

This is for a mini survey for a class. What cities do a lot of girls come from in certain sororites. Trying to look at trends within each sorority, mainly focusing on cities in Oakland County, as well which soroities that have a higher number of out of state girls. For example, I’ve noticed a sizable amount of girls in Chi Omega come from Rochester. Looking for some major trends in this.