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.
Quintile colours run from dark blue (high returns on investment) through light blue, pink and red to crimson (low returns on investment). Countries in white lacked analysed SSTS.
