Oman is refurbishing and expanding the ports infrastructure in Muscat, Duqm, Sohar and Salalah to expand tourism, local production and export shares. Oman is also expanding its downstream operations by constructing a refinery and petrochemical plant in Duqm with a 230,000 barrels per day capacity projected for completion by 2021. The majority of industrial activity in Oman takes place in 8 industrial states and 4 free-zones. The industrial activity is mainly focused on mining-and-services, petrochemicals and construction materials. The largest employers in the private-sector are the construction, wholesale-and-retail and manufacturing sectors, respectively. Construction accounts for nearly 48 percent of the total labour force, followed by wholesale-and-retail, which accounts for around 15 percent of total employment and manufacturing, which accounts for around 12 percent of employment in the private sector. The percentage of Omanis employed in the construction and manufacturing sectors is nevertheless low, as of 2011 statistics.