In general, interpolating statistics based on your personal world view is often misguided. Almost fifty percent of all Americans have tried drugs at least once in their lives [0], you simply won't know about it because most won't speak about it openly. Statistically you're unknowingly acquaintances with a number of people who fall into that category. To quote [1]:

> By the time they’re in 12th grade, 46.6% of teens have tried illicit drugs.

[0] https://www.addictionhelp.com/addiction/statistics/

[1] https://drugabusestatistics.org/teen-drug-use/