Metro workers
Non-metro workers
80,000 workers
60,000
40,000
20,000
1957
2007
Metro workers
Non-metro workers
80,000 workers
60,000
40,000
20,000
1957
2007
Metro workers
Non-metro workers
80,000 workers
60,000
40,000
20,000
1957
2007
Metro workers
Non-metro workers
80,000 workers
60,000
40,000
20,000
1957
2007