I learned a piece of news! I read a piece of news about American economy this morning.I learned that the U.S unempolyment rate declined to 5.5% in February,down to two-tenths of 1 percent from January's figure.as many American companies added about 200,000 new workers to their payrolls.which was better than econimists were expecting and marked the 12th straight month of job growth above 200,000. however,some analysts are concerned about or keeping close tabs on another economic factor:wage growth.