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.
Connectivity strength view of network: edge thickness is proportional to the normalized strength (product of weight and convergence normalized by population size). Node size is proportional to population count. Self-connections are shown as small looping arrows.
