Je hebt gelijk, A&A.
Volgens Wikkipedia: The Pew Hispanic Center state that 57% of illegal aliens are of Mexican origin and about 75% are of Latin American origin. They also report that while the number of legal immigrants (including LPRs, refugees, and asylees) arriving has not varied substantially since the 1980s, the number of illegal aliens has increased dramatically and, since the mid 1990s, has surpassed the number of legal immigrants.
Maar je hoeft dus echt niet een grens over te lopen om illegaal in de VS te blijven, je kunt ook gewoon het vliegtuig nemen.