The Iowa program has about 15-20% acceptance rate.
It sent quite a few students to T5 every year (子壇就有好幾位!!)
https://www.lumiere-education.com/post/10-creative-writing-programs-for-high-school-students#:~:text=The%20Iowa%20Young%20Writers'%20Studio,rate%20between%2015%2D20%25.