Nigeria corruption rating by TI improved from 143rd to the 136th position in 2014. In late 2013, Nigeria's then Central Bank governor Sanusi Lamido Sanusi informed President Goodluck Jonathan that the state oil company, NNPC, had failed to remit US$20 billion in oil revenues owed to the state. Jonathan, however, dismissed the claim and replaced Sanusi for his mismanagement of the central bank's budget. A Senate committee also found Sanusi's account to be lacking in substance. After the conclusion of the NNPC's account audit, it was announced in January 2015 that NNPC's non-remitted revenue is actually US$1.48 billion, which it needs to refund to the government. Upon the release of both the PwC and Deloitte report by the government at the eve of its exit, it was however determined that truly close to $20 billion was indeed missing or misappropriated or spent without appropriation.