This continues a trend that’s been going on for at least a decade. From 1990 to 2015, the population of people age 100 and up grew fourfold.
There are a number of reasons older people are living longer, including improvements in public health, nutrition and medicine. But despite that, it’s unlikely that most of us will live until we’re 100. The average life expectancy around the world is roughly 71 years old, according to the World Health Organization; in the U.S., it’s nearly 80.