The world is on the brink of a demographic
milestone. Since the beginning of recorded
history, young children have outnumbered
the number of people aged 65 or older will
outnumber children under age 5. Driven by
falling fertility rates and remarkable increases in
life expectancy, population aging will continue,
even accelerate (Figure 1). The number of
people aged 65 or older is projected to grow
from an estimated 524 million in 2010 to nearly
1.5 billion in 2050, with most of the increase in
developing countries.