With the enactment of the Amnesty Law in 1979, Brazil began a slow return to democracy, which was completed during the 1980s. Civilians returned to power in 1985 when José Sarney assumed the presidency. He became unpopular during his tenure through failure to control the economic crisis and hyperinflation he inherited from the military regime. Sarney's unsuccessful government led to the election in 1989 of the almost-unknown Fernando Collor, subsequently impeached by the National Congress in 1992. Collor was succeeded by his vice-president, Itamar Franco, who appointed Fernando Henrique Cardoso Minister of Finance. In 1994, Cardoso produced a highly successful Plano Real, that, after decades of failed economic plans made by previous governments attempting to curb hyperinflation, finally stabilized the Brazilian economy. Cardoso won the 1994 election, and again in 1998. The peaceful transition of power from Cardoso to his main opposition leader, Luiz Inácio Lula da Silva (elected in 2002 and re-elected in 2006), was seen as proof that Brazil had achieved a long-sought political stability. However, sparked by indignation and frustrations accumulated over decades from corruption, police brutality, inefficiencies of the political establishment and public service, numerous peaceful protests erupted in Brazil from the middle of first term of Dilma Rousseff, who had succeeded Lula after winning election in 2010. Enhanced by political and economic crises with evidence of involvement by politicians from all the primary political parties in several bribery and tax evasion schemes, with large street protests for and against her, Rousseff was impeached by the Brazilian Congress in 2016. In 2017, the Supreme Court asked for the investigation of 71 Brazilian lawmakers and nine ministers in President Michel Temer's cabinet allegedly linked to the Petrobras corruption scandal. President Temer is himself accused of corruption. In 2018, 62% of the population on a poll claimed that corruption was Brazil's biggest problem. On 25 February 2020, the COVID-19 virus was confirmed to have spread to Brazil on 25 February 2020. On 19 June 2020, the country reported its 1 millionth case; at this time, there had been nearly 49,000 reported deaths. As of June 2020, Brazil has the second-highest number of confirmed COVID-19 cases in the world behind the United States. Brazil occupies a large area along the eastern coast of South America and includes much of the continent's interior, sharing land borders with Uruguay to the south; Argentina and Paraguay to the southwest; Bolivia and Peru to the west; Colombia to the northwest; and Venezuela, Guyana, Suriname and France (French overseas region of French Guiana) to the north.