Jim, For the most part almost everyone coming in at winfly will stay on for the summer. The exceptions are some of the science groups, who come down just for the winfly season and sometimes some very limited projects with short durations.
These would be things like we purchased a service and the company is sending their own people down to do the work. Winfly is great time period for that because the station is still relatively empty and they can shut down buildings to do work. It gets much harder at mainbody after we have a thousand people here.