NEW : nearly 600 people remain missing , official says . Concepcion remained in effect for Saturday in Curfew , scene of worst looting . about 10 percent of Chile 's economy affected by quake , particularly fruit and mining sectors .
NEW : 19 people remain missing , official says . Curfew remained in effect for third day in Concepcion , scene of worst looting . 70 percent of Chile 's economy affected by quake , particularly fruit and mining sectors .