Last week we posted an overview of the 7 Things to Know About the 2015 Population Projections. The post has brought up some interesting questions about how these 2015 projections differ from the projections made by the UN in 2012. The following are some of the more dramatic, interesting, or unexpected changes that came about over the past 3 years:
On July 29, 2015, the United Nations released its twenty-fourth revision of the World Population Prospects, an updated collection of demographic data that outlines trends in our current and projected population growth.
2015 marks the 70th anniversary of the United Nations’ founding. This milestone provides a marker for exploring and reflecting back on just how different the world’s demographics are today in comparison to 1945. Here are a few snapshots:
According to the Population Reference Bureau, Total Fertility Rate (TFR) is defined as, “the average number of children a women would have assuming that current age-specific birth rates remain constant throughout her childbearing years.” Simply put, total fertility rate is the average number of children a woman would have if a she survives all her childbearing (or reproductive) years. Childbearing years are considered age 15 to 49.
Sometimes the terms “life span” and “life expectancy” are used interchangeably, but they have different meanings. So what is the difference between life span and life expectancy?
Life span is the number of years that one person lives. We can calculate an average life span of people in a group if we have birth and death dates for its members. You will have only one life span.
This is post 5 of 6 in a series about the Demographic Transition Model – a fundamental concept in population education, which is covered in Social Studies courses, most notably AP Human Geography.
This is post 4 of 6 in a series about the Demographic Transition Model – a fundamental concept in population education, which is covered in Social Studies courses, most notably AP Human Geography.