Passage: According to the United Kingdom Census 2001, the workplace population of 90,656 is divided into 60,118 people who live in Peterborough and 30,358 people who commute in. A further 13,161 residents commute out of the city to work. Earnings in Peterborough are lower than average. Median earnings for full-time workers were £11.93 per hour in 2014, less than the regional median for the East of England of £13.62 and the median hourly rate of £13.15 for Great Britain as a whole. As part of the governments M11 Corridor, Peterborough is committed to creating 17,500 jobs with the population growing to 200,000 by 2020.
What two groups of people are the workplace population divided into for the United Kingdom Census 2001?