I wanted to see that image a little larger so I googled for it and here is the first item returned...
http://kurtostergaard.com/us-population-by-time-zone/US Population by time zone
Time zone and Percent
Eastern: 47.0%
Central: 32.9%
Mountain: 5.4%
Pacific: 14.1%
Alaska and Hawaii: 0.6%
Isn’t this the most fascinating piece of worthless information you ever saw?