[squid-users] Squid Install w/ 3.1 and not 2.7

[berry guru]

I'm wondering how to install the latest version of Squid ...version
3.1 on Ubuntu server using apt-get.  When I run the command 'sudo
apt-get install squid' its going out and grabbing version 2.7.STABLE9.
 How do you get the latest version?  What tells apt-get to go out and
grab the 2.7 version and not the 3.1 version?