How many years in average do people stay on a Guam base? I mean by preference? Like 4-5 years and return to the mainland for upgrade? Or a few years for the experience then return mainland when your kids start elementary school? Or until you get tired of the small island life? When you run out of things to do or tired of the expensive groceries? Just curious. Or are there also people who plan on spending 20-30 years there forever?