Sierra Leone is perhaps best known for its blood diamonds that are mined and sold for high prices during the civil war.[citation needed] In the 1970s and early 1980s, economic growth rate slowed because of a decline in the mining sector and increasing corruption among government officials. By the 1990s economic activity was declining and economic infrastructure had become seriously degraded. Over the next decade much of the formal economy was destroyed in the country’s civil war. Since the end of hostilities in January 2002, massive infusions of outside assistance have helped Sierra Leone begin to recover. Much of the recovery will depend on the success of the government's efforts to limit corruption by officials, which many feel was the chief cause for the civil war. A key indicator of success will be the effectiveness of government management of its diamond sector.