Oregon State Troopers stepped up enforcement efforts this New Year's Eve.  Troopers say that effort resulted in 39 arrests for driving under the influence between Dec. 31 and 6 a.m. on New Year's Day. Twenty-six of those arrests were after 12 midnight.  Troopers say since the New Year's holiday enforcement effort began at 6 p.m. Friday, 73 arrests were made for driving under the influence. That compares with 53 arrests during the same period last year. Local law enforcement made 4 DUII arrests through the holiday period.