text:  With SRN News, I'm Bob Agnew in Washington. The number of people seeking unemployment benefits ticked up last week but remained at an historically low level, reflecting a robust U.S. labor market with near-record high job openings and few layoffs. Jobless claims rose by 18,000 to 185,000, according to the Labor Department. That comes after nearly touching the lowest level since 1968 in the previous week.