 Of these countries, India is unusual in having a much lager number of students at the graduate study level than the undergraduate study level, while Brazil and Saudi Arabia are unusual in having a large fraction of their students enrolled in non-degree programs.Until the late 19th century, migration to the United States was relatively unrestricted, so that there was no special immigration status needed for students .However, the Carriage of Passengers Act of 1855 recognized a separate category for temporary immigrants, and the Chinese Exclusion Act, that excluded all Chinese skilled and unskilled laborers, carved out an exception for students.