Notes on Population Pyramid

We watched two videos on pyramid population. I will describe how a population pyramid works. It is split into two sides, one female and one male. Each row is years of age. Row one is years zero through four. Row two is five through nine. Row three is ten through fourteen and so on. It goes up to 100 plus years. Years zero through fourteen is pre productive and that is three rows. Years 15-44 is reproductive and is 6 rows. Years 45-100 plus is post reproductive and that has twelve rows. The pyramid is a powerful predictor of future population trends. In Japan their population will keep decreasing because more people are in their post reproductive age. Their are less in the reproductive age and many people are only having one child. Rwanda will be a fast growing country, their are a lot of people in the pre reproductive age so their are going to be many babies born soon. Canada's population will increase but slowly because most people are in the reproductive age. Once they are gone there won't be as many people going from pre reproductive to reproductive. The population will grow but slowly.