As you have probably discovered, fuse 51 powers the outlet as well as the serial data connector (OBDII). Fuse 45 only powers front and rear outlets. (I believe but not sure, 45 is the right, 51 is the left; HOWEVER, if the center panel was ever removed, and most likely it has been, those connectors can get swapped around quite easily.)
If fuse 45 is blowing make sure to check the rear outlet for foreign debris. If they continue to blow, something is wrong (99 percent of the time, if a fuse blows something is wrong in the circuitry and that incudes connectors.)
You can do some simple isolation of the two outlets (front/back) to try and determine what is causing the fuse(s) to blow. As someone already mentioned, these outlets are not the ideal connector for power; they have not been changed since the first day they were invented. They are cheap and easy to replace and even though I am not the type to throw parts at a problem, they are the least expensive and easiest items to jump on first. (Note: The male accessory connectors on many items are also very cheap and tend to blow fuses. However, most (not all) have an internal fuse in the male connector. So make sure to check that fuse too, just unscrew the end of the connector and there is usually an inline "buse" style glass fuse.)
However, first thing I would do is inspect them for possible foreign debris and go from there.
(I had one in my 08 replaced last year after a trip to Ouray. The internal insulator literally melted.
