How Do Farragut West Riders Get Home?

Every morning rush hour that I ride Metro's Orange and Blue lines toward Metro Center, 70% of the riders exit at Farragut West (FW). I never thought anything of this until I realized on my return afternoon rush hour ride that less than 30% of morning FW riders board for the ride home. I assumed FW riders would return home by boarding at the same station they arrived, but they must be a different breed. How is it possible that for every 10 people exiting at FW in the morning, only 2 or 3 will board during rush hour later that day? Like that smell in the Rosslyn station, it's just another unsolved metro mystery.