These numbers might not be accurate anymore, but I saw someone post this on reddit https://www.ischool.utoronto.ca/wp-content/uploads/2018/03/Faculty-Council-Package-March-22-2018-updated-Apr4.pdf
from page 19, "In 2017-18, there were 690 applications for 254 positions in the MI program and 177 applications for 42 positions in the MMSt program.", which means back then the acceptance rate was around 37%. I'm not sure if it would be higher or lower now since I think the program has expanded, but also more people are applying, i.e. on reddit someone said that at an admissions event, there were already 1000 international applicants by December, when usually they receive 1000 applicants for the whole year:
I'm guessing this is also why it's taking so long for all of our applications to move past "Documents Received" (been over a month for me now).