Authorities privatized more than 100 government owned companies after 2003 in industries including oil refining, tourism and real estate, of which 29 were 100% foreign owned. Many international oil companies returned to the country, including oil giants Shell and ExxonMobil. After sanctions were lifted there was a gradual increase of air traffic, and by 2005 there were 1.5 million yearly air travellers. Libya had long been a notoriously difficult country for Western tourists to visit due to stringent visa requirements.