Eritrea: 6.7 + 6.5 = 13.2% of the population is aged 0-4

Japan: 1.7 + 1.6 = 3.3% of the population is aged 0-4

Analysis: We can infer that the birth rate is lowest for Japan, the middle for Canada, and the highest for Eritrea.

Eritrea:  1.6%

Japan: 16.5%

Analysis:  We can infer that the life expectancy is lowest for Eritrea, the middle for Canada, and the highest for Japan.

Eritrea: 42.4__%    younger = 38.1            older=  4.4

Japan: 41.2__% younger = 11.5             older = 29.7

Analysis:  We can calculate the total dependency load for ages 14 and under + 65 and older. Canada has the lowest total dependency load, Japan has the medium total dependency load , and Eritrea has the highest  total dependency load.

Life Expectancy: The average period that a person may expect to live.

Dependency Load: The proportion of people in a population who are considered economically dependent on working-age population.

Countries differ in life expectancy, birth rates, and dependency loads because of different health care, economies, education, culture and policies. These varying factors lead to different population situations.

(why do you think that countries have different levels of health care and education?)

Countries have different levels of health care and education because they might not be financially stable.

These patterns are important to look at now and in the future because they help us for the future by showing how our population is changing. This data might be found useful for governments and policymakers. For example, if the birth rate is to high the governments might reduce the amount of immigrants entering the country but if it's too low they would want more immigrants to come to their country.