@Alexandre,
You missed a piece of contextual information: there were 9,149 international applicants.
The combined pool of OOS (44,014) and international (9,149) applicants had a 19% acceptance rate. We don’t know from the article the actual acceptance rates of OOS vs. international. I’d imagine international has the lowest overall acceptance rate, but it’s pure speculation.
Nevertheless, the numbers show that Michigan continues to be a world-class draw.