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.
(0-2000ms WT n=92, Dp16 n=99; 2000-4000 ms WT n=53, Dp16 n=48; 4000-6000ms WT n=40, Dp16 n=19; 6000-8000 ms WT n=9, Dp16 n=17; 8000-10000ms WT n=7, Dp16 n=9; >10000ms WT n=12, Dp16 n=16)
