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.
The middle line marks the median over the sightings, the box represents the interquartile range, and the whiskers provide the range, excluding outliers (which are indicated by crosses).
