The latest Harvard/Harris Poll reveals that when Americans are asked how many illegal aliens are arriving at the U.S.-Mexico border, only about 13 percent answer correctly. Meanwhile, about 76 percent of Americans believe illegal immigration levels are vastly lower than they actually are.For example, there were nearly 100,000 border apprehensions in April, alone. This puts illegal immigration at the southern border on track to outpace every year of illegal immigration under former President Obama and take the U.S. back to Bush era levels. At current rates, experts project there to be 863,000 border apprehensions this Fiscal Year, though this only counts illegal aliens who are caught at the border and does not include those who successfully cross.Since Fiscal Year 2010, the number of border crossers and illegal aliens apprehended trying to enter the U.S. has been anywhere between 300,000 to 500,000.In the Harvard/Harris Poll, though, less than two-in-15 American voters correctly said there are between 250,000 to 500,000 border apprehensions each year. Meanwhile, more than three-in-four Americans incorrectly said there are between zero to 250,000 border apprehensions a year.