Figure 5. Comparison between the observed (cross) and the simulated (bold line) distributions for 2012.
Inset: the estimate of 
in the period 2005–2012.
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.