Complete ACS data series



I am writing a master's thesis for which I need data from ACS/Census and I am having trouble to find figures beyond a certain level of detail. Just to give you an example, I need the figures on foreign-born population over the last 10 years by country and year. I found data by region (Europe, Asia,...), but not by country. I thought I could find this in via FTP ( but I cannot figure out where to find the whole set of data for a given year and how to navigate that information by topic.

I know this data exist as MPI has produced tables based on them:

Any help would be much appreciated.