The 20,071 has got to be wrong. Accidentally added an extra digit maybe? 2,071 might be reasonably close to the actual number…
AACOM reported 439 "non-citizen & temporary resident " applicants in 2015
(numbers here: http://www.aacom.org/docs/default-source/data-and-trends/2012-15-app-report.pdf?sfvrsn=10)
AMCAS reported 1160 international applicants in 2014
(numbers are here: https://www.aamc.org/download/321460/data/factstable3.pdf)
TMDSAS schools do not accept applications from internationals.