An increase in the St. Mary Parish unemployment rate and decrease in jobs during March is likely due to continued sluggish business in the oilfield and shipbuilding industries, a parish economic official said. St. Mary’s unemployment rate rose to 6.6 percent in March from the 6.3 percent rate in February, according to Louisiana Workforce Commission statistics. The parish workforce, the sum of employed residents and those looking for work, increased slightly to 19,740 people during March from 19,704 people in February. However, the number of employed residents saw a slight drop during that time period. In March, 18,432 St. Mary ...