15% sounds very high. My quick google showed that only 15% take any calculus. [1] 1: https://www.edweek.org/teaching-learning/calculus-is-the-peak-of-high-scho

15% sounds very high. My quick google showed that only 15% take any calculus. [1] 1: https://www.edweek.org/teaching-learning/calculus-is-the-peak-of-high-school-math-maybe-its-time-to-change-that/2018/05#:~:text=Today%2C%20some%20800%2C000%20students%20nationwide,the%20course%20before%2011th%20grade https://www.edweek.org/teaching-learning/calculus-is-the-pea....