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The number of births in a population per year per 1000 people 

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Analysis: With 15.6% of its population falling into the 0-4 cohort, Cameroon has the highest percentage, followed by Canada with 4.9% and Japan with 3.3%.

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It's a statistical measure of the average time an organism is expected to live based on the year of its birth, current age and other demographic characteristics

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Analysis: Japan has the greatest number of people aged 75+ at 17%, followed by Canada at 8.6% and Cameroon at 0.8%.

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The percentage of the population that is non-working. It is conventionally defined as including people younger than age 15 and older than age 65

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Analysis: With a dependency load of 44.6%, Cameron has the highest dependency load, followed by Japan with a dependency load of 41.6%, and Canada with a dependency load of 35%.

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Population patterns are impacted by many factors which include:

Geographic location: The location of a population can significantly affect its development and growth. For instance, Canada has extreme weather conditions, whereas Japan and Cameroon experience significantly better climates, allowing them to utilize their natural resources more effectively.

Natural disasters: They can cause a significant impact on the population. For instance, it could result in fatalities, displacement (fleeing from one's house and seeking temporary shelter), increased health problems, social disruption and more.

Existing population: More people living there implies more children being born, which increases the population. For instance, Japan has a high population, which indicates that many people would be willing to have kids in the future.

Historical factors - A place's future will be influenced by its past. For example, if a place had a war or a famine it would have a lower population in the coming generations.

Cultural differences: Some cultures place a greater emphasis on having large families. They adhere to various beliefs and gender roles. For instance, Cameroon has the highest birth rate, indicating that the majority of its people are willing to have children.

The economic conditions of the country - The population is significantly impacted by a lack of resources. For instance, Cameroon is still a developing country, while Japan is a highly developed nation with excellent health care and resources.

Political factors - The population is also impacted by political policies like immigration and emigration laws. For instance, Canada has many more immigrants than either Japan or Cameroon.

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We care about population patterns because -

They are useful for studying the future of a country

To add to it, they are useful in examining historical and current population trends. For instance, they will help us know what Canada’s population is now and what it was a hundred years ago.

Population patterns have a significant impact on our lives. They determine the social, economic and environmental economy of countries. For example, a bigger population means more people working, which in turn increases the economy of a country.

Our future depends on our population, it depends on the next generation. For example, Canada’s declining birth rate causes the need for more immigrants as we don't have enough skilled workers.

These population pyramids help policymakers and stakeholders make informed decisions. For instance, these would let the government of Japan know that they need to work on their immigration and emigration policies before they overuse their natural resources.

A bigger population will result in the overutilization of our available resources. For example, Japan has a growing population and this will lead to needing more resources.

Planning social services - Helps the government understand the changing needs of a population, including health care, housing, schooling and more. For instance, the population pyramid will let the government of Cameroon know the need for more schools and a better health care system.