A world map shows high (dark blue) urban population in America, Australia, parts of the Middle East, Southeast Asia; moderate (blue) in parts of Africa, Asia, and Eastern Europe; low (light blue) in Central/South Asia, and Sub-Saharan Africa.
Class | Rank | Percent | Major Iron-Producing Areas in North America | High | Class | Rank | Percent | 80 and over inches | 60–79 inches | 40–59 inches | 20–39 inches | 10–19 inches | Under 10 inches | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.52% | 1 | 58.7% | 2.48% | 15.0% | 26.8% | 41.2% | 7.90% | |||||||
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