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.
Data are median with 25th to 75th percentiles (boxes), 10th to 90th percentiles (bars), and values outside the given percentiles (dots).
