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Dependency load: The percentage of people who depend on others for support.

Birth rate: The number of babies born in a specific population over a certain period of time, usually per 1,000 people.

Life expectancy: The average number of years that a person is expected to live based on numerous factors like their country, health, and lifestyle.

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The population between the ages of 0 and 4 makes for 4.9% of the population in Canada, 3.3% in Japan, and 15.4% in Zambia. The percentage of young children in each country's population is shown by these percentages.

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In Canada, 8.6% of people are 75 years of age or older; in Japan, the percentage is much higher at 17%. in Zambia, however, the percentage is far lower, at just 0.4%. The proportion of elderly adults in each nation's population is shown by these percentages.

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According to the data, Zambia has 44.1%, Japan has 41.6%, while Canada has the lowest reliance load at 35%.

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Understanding the variations in life expectancies and birth rates within countries helps our understanding about social and economic patterns. It can also inform policies, healthcare systems and even help address global inequalites. Planning for a sustainable future involves it!