HARRISBURG (AP) – The PA Department of Labor and Industry said that the unemployment rate for the Keystone State dropped three-tenths of a percentage point to 5.4% in December. The national rate was 3.9% in December. In a survey of households, the labor force shrank for the seventh straight month, reflecting a worker shortage that some economists attribute partly to an increase in people who have recently gone to work for themselves. In a separate survey of employers, payrolls in PA grew in December by over 14,000, driven primarily by hiring in trucking and warehousing.