Who are the illegal immigrants in the United States 1 1 10,000?

Of the 1 1 10,000 illegal immigrants stranded in the United States, 40% are not low-paid laborers who sneaked in from the US-Mexico border, but foreigners who arrived in the United States legally but their visas expired. The demographic data of these so-called overstayers in the United States are very rare, but some studies believe that these people are often better educated and fluent in English in Europe, Asia and Africa than those who illegally cross the US-Mexico border. In many cases, they enter the United States on tourist visas.