In 25 years, there will be more old Americans than young ones

At a rate probably without precedent in American history, the number of older Americans is catching up with younger Americans — and is projected to overtake it within three decades.

Thanks to lower life expectancies a century ago, there were relatively few Americans 65 and older. The population aged 18 and younger made up a substantial portion of the population.

Over time, that older population grew much larger.