Population Structure
Population structure can be shown as a population pyramid, see diagram below:
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Features of a population pyramid.
- Population is divided into 5 year age groups.
- Population is divided into males and females.
- The percentage of each age /sex group is given.
Typical pyramids
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| MEDC/LEDC Occupational Structures | |||
| Primary | Secondary | Tertiary | |
| MEDC | Very low. Machines have largely replaced human labour on the farms. | Low. Automation is increasingly replacing human labour in factories. Globalisation is leading to a shift of manufacturing jobs to the NICs. | High. Large numbers are employed in education, health, administration and the knowledge economy |
| LEDC | Large primary sector (farming). Exports are usually primary commodities. | Low. Tariff barriers imposed by the trading blocs such as the EU prevent the export of cheap manufactured products. The domestic market is very small. | Large service sector. Many employed in the informal economy. |
| NIC | Shrinking primary (farming) sector. | Secondary sector is large and growing (transnationals). | Small but growing tertiary sector to serve the needs of the transnationals |