&gt; Do you mean the U.S or the whole world<p>Both: <a href="http:&#x2F;&#x2F;www.un.org&#x2F;en&#x2F;development&#x2F;desa&#x2F;news&#x2F;population&#x2F;world-urbanization-prospects-2014.html" rel="nofollow">http:&#x2F;&#x2F;www.un.org&#x2F;en&#x2F;development&#x2F;desa&#x2F;news&#x2F;population&#x2F;world-...</a>