Workers make cupboards to be sold to customers, at a workshop in Soweto, March 22, 2012.The number of people employed in South Africa's formal sector inched up only 0.3 percent in the fourth quarter of 2011 with the manufacturing sector among the few that added jobs, Statistics South Africa said on Tuesday.Chronic unemployment remains one of the biggest challenges facing Africa's biggest economy, with nearly 24 percent of the labour force reported as jobless in the fourth quarter of last year.