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.
Usage average by month. Between May and August, the usage average is higher, and the system is more dynamic. This could be related to temperature. Similarly, during the autumn and winter months, usage decreases progressively. From February to April, levels of usage slightly vary.
