If you have a working implementation of Java 1.1, you will see a Size Tree diagram of US population data. By clicking on various locations, you can quickly change the scale revealing details within the data that are not apparent at full scale.
Clicking on any box scales that node to fill the available height. Clicking outside the boxes scales the entire data set to fill the available height. Clicking on the copyright notice takes you to my home page. :-)
Click on any state or region to change the scale of the chart. The fraction of the size in view is displayed at the upper left corner. Click in the background to reset the scale.