Tourism has been identified as one of the three priority economic sectors (the other two are fisheries and agriculture) for economic development. In 2006, estimated visitor expenditure reached $1.6 million making tourism a major export industry for Niue. Niue will continue to receive direct support from the government and overseas donor agencies. The only airport is Niue International Airport. Air New Zealand is the sole airline, flying twice a week from Auckland.[47] Hanan International Airport was served by a local airline in the early 1990s, Niue Airlines, however it closed in 1992. There is a tourism development strategy to increase the number of rooms available to overseas tourists at a sustainable level. Niue is trying to attract foreign investors to invest in the tourism industry of Niue by offering import and company tax concessions as incentives.