The senior population in the U.S. has grown as the baby-boom generation has progressed into the 65 years and older age group. In 2023, there were 59,307,056 Americans over the age of 65.

Nowhere in the United States has a larger share of women giving birth at 40 or older than the Bay Area, according to data from the U.S. Center for Disease Control and Prevention. The hot spot is Marin ...

exponential growth: Continuous increase or decrease in a population in which the rate of change is proportional to the number of individuals at any given time. age structure: The distribution of ...