Fig. 1.
a Geographic distribution of followers based on country. b Geographic distribution of followers based on city. Only the top 45 countries and cities are displayed
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.