By some accounts, Gothenburg (Sweden's second-largest city) has contributed more ISIS fighters than all of those from the USA.
Of course, we don't really know how many jihadists have originated from our own country since the Obama administration doesn't seem to care much. They tell us about a dozen to twenty- a figure happily trumpeted by CAIR. The above article uses a figure of about one hundred. But who cares when you consider how many people the Crusaders killed hundreds of years ago? That seems to be more important to our lackadaisical president.
Come to think of it, the Swedish government doesn't seemed too concerned either.