Can I set up my form to auto populate from previous use?

I have created a check-in form for attendees to register their attendance each week at our meetings.  How do I set up my form so that it automatically enters the attendee's information from the previous week? 

Hi,

Unless you would like to edit the same submission each time, this is not possible.

http://www.jotform.com/help/40-How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date

Though it is not possible to populate a form based on who is using it.