25%? This number may be true for Japan but everywhere else it must be much, much less…
He did say less than 25%. That could mean 0.1%. Statistics are misleading like that. Learn to question them. 
Give this a read.
Very much recommend this book. Reading this was one of the most important assignments I ever got in high school. It’s amazing how easy it is to lie through your teeth, technically telling the truth the whole time.
Get Ever 17. It’s non-adult. Once you’ve gotten them hooked, explain the rest of it.