Can you do a running total in a pivot table?

I have some data that I'm trying to run in a pivot table. I've got it laid out the way I need it, but I would like to see a running total. This is what I have currently,

If you look at the 0ME unit, it should read 96.77% | 96.77%| 97.23% | 97.23% | 100.00%

This is easy to do in a graph with a running total, but I can't find a way to make it work with a table. Thanks in advance for your help.