The Second Republic of Uganda existed from 1971 to 1979, when Uganda was ruled by Idi Amin's military dictatorship. The Ugandan economy was devastated by Idi Amin's policies, including the expulsion of Asians, the nationalisation of businesses and industry, and the expansion of the public sector. The real value of salaries and wages collapsed by 90% in less than a decade. The number of people killed as a result of his regime is unknown; estimates from international observers and human rights groups range from 100,000 to 500,000.