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Definition of dependency load: The percentage of 14 and under + 65 and older

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The dependency load between Canada, Japan, and Mail is that Japan has a higher distribution of population by 0.6% for Canada and 4.7% for Mail.

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Definition of birth rate : Birth rate is the population in the 0-4 age

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The difference between the Mail and the two other countries is that Mail has an 18%. Canada has a 4.9% birth rate population while Japan has a 3.3% birth rate.

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Definition of life expectancy: The population age 75+ (people who live longer)

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Japan has a life expectancy of about 17% as for Canada, it has 8.6%. It has a much more lower percentage than Japan, but in Mail, Mail has a 0.6% life expectancy which makes it the most lowest percentage from the other two countries.

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The population patterns exist because in every country, they need data to keep track of the population to estimate what the population might be in the near future so they know what build or focus on. Example, since there was a huge population rate of children back in 1951, that would make us (right now) have less children but there'd be a lot of elderly for a few years until the population rate of children start to grow again.

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We care about this information because of we don't have this type of info, we wouldn't know what to focus on or support in the future. The information we take from the data is used to help people that needs health care, insurance, homes, food, etc...