Population Age Structure 

The world population is growing older. With continued declines in fertility and mortality, the global population's shift toward an older age structure, known as population aging, will accelerate. Older adults' (ages 65+) share of the global population increased from 5 percent in 1960 to 9 percent in 2018 and is projected to rise to 16 percent by 2050, with the segment ages 85 and older growing the fastest. Children's (ages 0 to 14) share is falling, from 37 percent in 1960, to 26 percent in 2018, with a projected decrease to 21 percent by 2050.
Explore the data at worldpopdata.org