User blog comment:Scrawland Scribblescratch/Presidential Stuff/@comment-4621372-20120901222201/@comment-4727448-20120901222855

Oh, I forgot to say. They mean that they are one term. So two ones next to each other veritcally indicate that this was one term. Take this for example:

Zachary (1)

Millard (1)

This means that Millard and Zach combined filled one four year term.