flora and fauna on the island have become extinct. Due to deforestation, the last wild endemic St Helena olive tree, Nesiota elliptica died in 1994, and by December 2003, the last cultivated olive tree died. The native St.Helena earwig was last seen in the wild in 1967. A large reforestation project has been under way since 2000 in the north-eastern corner of the island, known as the Millennium Forest, to recreate the Great Wood that existed before colonisation. The island's shoreline is deep and is known to have abundant red crab. In 1991, a crab-fishing vessel, Oman Sea One, which was engaged in potting of crabs, capsized and later sank off the coast of Saint Helena on its way from Ascension Island, losing four crew members. One crew member was rescued by . Economy Note: Some of the data in this section have been sourced from the Government of St Helena Sustainable Development Plan The island had a monocrop economy until 1966, based on the cultivation and processing of New Zealand flax for rope and string. A 2019 report states that "by the 1970s, a majority of Saints were working abroad and sending money home". Saint Helena's economy is now developing, but is almost entirely sustained by aid from the British government. The public sector dominates the economy, accounting for about 50% of gross domestic product. However, the commencement of regular air services demonstrates rise in tourism, and the Government is encouraging investment on the Island, as can be shown by their Investment Policy and Strategy and the investment prospectus for potential investors. In 2019, Saint Helena achieved its first-ever "Investment Grade" credit rating, a credit rating of BBB- (stable), from global credit-rating agency Standard & Poors (S&P). In 2019, the estimated average annual salary was only about 8,000 Saint Helena pounds (about US$10,000.) Saint Helena's Sustainable Economic Development Plan, 2018–28, was developed using more than six months of local and international consultation in 2017 to 2018. The document represents a 10-year plan to kick-start the economy after Saint Helena established air access and fibre connectivity and moved away from relying purely on tourism for growth, announcing a desire to "increase exports, and decrease imports". The SEDP stated that the island's comparative advantages are its natural resources and geography, its status as a British Overseas Territory, its currency, relatively inexpensive labour and property costs, and low crime. Targeted export growth