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 decay pattern of PDF downloads are consistent with the pattern of HTML views. Both profiles possess the same two phases of decay. The profile of XML downloads does not share the same characteristics.
