Zuma faced significant legal challenges before and during his presidency. He was charged with rape in 2005, but was acquitted. He has fought a long legal battle over allegations of racketeering and corruption, resulting from his financial advisor Schabir Shaik's conviction for corruption and fraud. On 6 April 2009, the NPA dropped the charges against Zuma, citing political interference, although the decision was successfully challenged by opposition parties, and the charges were before the NPA for reconsideration. After extensive state-funded upgrades to his rural homestead at Nkandla, the Public Protector found that Zuma had benefited improperly from the expenditure, and the Constitutional Court unanimously held in 2016's "Economic Freedom Fighters v Speaker of the National Assembly" that Zuma had failed to uphold the country's constitution, resulting in calls for his resignation and a failed impeachment attempt in the National Assembly. Zuma's rule is estimated to have cost the South African economy R1 trillion (approximately US$83 billion). He has also been implicated in reports of state capture through his friendship with the influential Gupta family. He survived multiple motions of no confidence, both in parliament and within the ANC.