According to the Institute of International Education (IIE), in the 2018–19 academic year, over 1 million international students enrolled in institutions of higher education in the United States.  This number is double the 547,867 students who were enrolled 20 years prior in 2000–01.  It is estimated that international students add over $40 billion to the US economy each year.  Since World War II, the United States has been a top destination for international student enrollment.