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.
Boxes indicate the interquartile range; bold horizontal lines, medians; whiskers, the minimum and maximum, excluding the outliers; and open circles, outliers.
