Have teenagers ever been an important group for Facebook? It started for college students only, thus for the first few years the only other age group it could e

Have teenagers ever been an important group for Facebook? It started for college students only, thus for the first few years the only other age group it could expand to were people who started using it in college and continued to do so as they got older. My assumption would be from there it spread to/through friends and coworkers (most of which would be past their teens).