Knowledge on population ^.^

with a population pyramid, you can tell what the mortality rate, fertality rate, and weather the health care is good or bad.  the "kiddos" (0-20) and the "oldies" (65 +)are collecting money from the government.  The "active" people (20-60) are making money.  population pyramids are all different sizes, like a triangle, box, or cup.  the triangle signifies that the country is a developing nation and that there is a short life expectancy.  a box means the nation is developed but growing slowly, there is a short life expectancy.  a cup means it is a developed nation but there is negative growth, there is a long life expectancy.