Northwestern University:

Admissions are characterized as "most selective" by U.S. News & World Report. There were 35,099 applications for the undergraduate class of 2020 (entering 2016), and 3,751 (10.7%) were admitted, making Northwestern one of the most selective schools in the United States. For freshmen enrolling in the class of 2019, the interquartile range (middle 50%) on the SAT was 690–760 for critical reading and 710-800 for math, ACT composite scores for the middle 50% ranged from 31–34, and 91% ranked in the top ten percent of their high school class.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". How selective are admissions at Southwestern characterized by U.S. News & World Report?
unanswerable