To begin, multiply 155,000,000 by 1.2% (0.012) to find the per-year growth. This gives a value of 1,860,000 new people in the labor force every year. This is the number of people for 12 months, so we need to find 1/12 of this value, or to divide 1,860,000 by 12. This gives a rate of 155,000 new jobs that have to be created each month to keep unemployment stable.