Tuvalu comprises four reef islands and five true atolls that result in a "contiguous zone:" "exclusive economic zone:" "territorial sea:" Its nearest neighbours are Kiribati, Nauru, Samoa and Fiji. Tuvalu has worked with Secretariat of the Pacific Community (SPC) and the European Union and enacted the Seabed Minerals Act 2014. The SPC-EU Pacific Deep Sea Minerals Project involves cooperation between the Cook Islands, Fiji, Tonga and Tuvalu with the object of those countries making informed decisions about future deep seabed mineral activities. The population at the 2012 census was 10,460, which makes Tuvalu the third-least populous sovereign state in the world; as compared to its immediate neighbours, it has a larger population than Nauru, but is smaller than Kiribati which has a permanent population of just over 100,000 (2011). In terms of physical land size, at just Tuvalu is the fourth smallest country in the world; as compared to its immediate neighbours, Tuvalu is larger than Nauru, which is , and smaller than Kiribati, which comprises groups of atolls dispersed over 3.5 million square kilometres, (1,351,000 square miles) of the Pacific Ocean. Tuvalu's Exclusive Economic Zone (EEZ) covers an oceanic area of approximately 900,000 km2. Tuvalu is considered a safe country of unspoiled natural beauty and friendly people. However, due to its remoteness, the cost of travelling to the island and limited air traffic to the country, limited numbers of tourists visit each year. The majority of visitors to Tuvalu are government officials, aid workers, NGO officials or consultants. Tuvaluans are primarily involved in traditional agriculture and fishing. Job opportunities also exist as observers on tuna boats where the role is to monitor compliance with the boat's tuna fishing licence. The Tuvaluan economy, therefore, relies heavily on its fishing income, with 42% of the Tuvaluan population involved in fishing activity at various levels. UN Data calculated a gross value of fisheries at US$43,773,582 (2007 est), which accounted for the output of coastal commercial fishing, coastal subsistence fishing, locally based offshore fishing, foreign-based offshore fishing, freshwater fishing and aquaculture. In recent years all of the income has been generated through the listed activities in Tuvalu waters, rather than through exports direct from Tuvalu.