Map of yorkshire for Nigeria won its independence from Great Britain in 1960; and after 16 years of military rule, a new constitution was ratified in 1999, establishing a three-branch government, including a president, a bicameral legislature and a supreme court. A major goal of the new government has been to establish economic reforms. Economically, Nigeria has suffered from exploitation, corruption, and mismanagement. Its dependence on oil and oil-related products resulted in an economic collapse in the late 1970s and early 1980s. While almost 31 percent of Nigeria is arable land, agricultural workers continue to live at subsistence levels, partially because of frequent drought and flooding. In 2000, 45 percent of the nation’s residents lived below the poverty line, while most of the wealth remained in the hands of the top 10 percent of the population. Nigeria’s human resources are potentially strong as the country is the most populous in Africa (130 million in 2002), but have been drained by the low life-expectancy rate of 50. Map of yorkshire 2016.