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.
Note: Cases normalized to a value between 0 and 100 to achieve better comparability with the search volume. The mean search volume is calculated for the five keywords and then normalized again to a value between 0 and 100.
