Breaking down the jobless reports by age group, we find that the biggest gain in jobs for the month was enjoyed by U.S. teenagers, as individuals Age 16-19 saw their numbers in the U.S. workforce increase by 106,000 to reach a total of 4,508,000. But you can't have a gain of 106,000 workers between the ages of 16 and 19 and only a net gain of just 17,000 people in the workforce for the month unless a lot of other people exited the workforce. All of those people, it would seem, were young adults between the ages of 20 and 24.