Figure 4.
Demographic change of age specific population from 1980 to 2010. The old age group has increased steadily while the younger age group has decreased.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.