Fewer Americans than forecast filed applications for unemployment benefits last week, dropping the average over the past month to the lowest in 15 years, indicating companies are holding on to workers. Jobless claims increased by 3,000 to 265,000 in the week ended May 2, a Labor Department report showed Thursday in Washington. The median forecast of 47 economists surveyed by Bloomberg projected 278,000. The dearth of applications for unemployment benefits shows demand remains strong enough for employers to maintain staffing levels.