What the chart shows: Follow each country’s age-structure from 2000 to 2050. The bars show the percentage of the population that falls into each 5-year age group. For instance, you can see Nigeria‘s continuing baby boom in the longer bars at the base of its pyramid; China and Germany, however, have bulges in the 60-85 age ranges.
Special report ... The new gig: America's hidden economy
More Americans are working than ever before, but a growing number of them aren't 9-to-5 employees, nor skilled freelancers who negotiate their compensation.
Between the lines: Instead they are your Uber driver, your DoorDash food deliverer or your Rover dog-walker.