" 1-1.5% of American students vs 7-8% of UK students or over 20% of Czech Republic students. " - This is an unfair comparison because the USA is roughly as big as Europe. You think the rate of Europeans getting out of their home country is fine within Europe, but you hold Americans to a higher standard: Somehow you want Americans not only to get familiar with their own country which is just as big as the EU, but also you think Americans are deficient for not expanding their horizon further beyond our EU-sized country. This is an unfair double standard.