Below are two charts with visuals of the top 15 sending countries in 2000 and the top 25 in 2010.  The “fields of study” map at the bottom is a bonus.  Using Open Doors data, Vietnam’s enrollment in 2001/02 was 2531 and was 13,112 in 2009/10, a 518% increase. 

Top 15 Countries for 2000

Top 25 Countries for 2010

Fields of Study:  2000-2010

Thanks to Jessica, editor of VOA’s Student Union blog, for these useful illustrations.