If the labor force participation rate falls , it must be true that : the number of people who are at least 16 years old in the population must be rising relative to the number of people in the country the number of people who are at least 16 years old in the population must be falling relative to the number of people in the country . the number of employed people who are at least 16 years old in the labor force must be rising relative to the number of people in the labor force the number of employed people who are at least 16 years old in the labor force must be falling relative to the number of people in the labor force .