You are allowed to reapply for a re-entry permit from USCIS. If you continue to reapply and USCIS sees that you have spent four of the past five years abroad, then your re-entry permit will be issued for one year instead of the usual two.
There are exceptions to this rule depending on your reasons for being abroad and in the U.S.. For example, U.S. governmental employees who need to travel for work purposes.