Antananarivo has suffered from debt and mismanagement. The CUA estimated in 2012 that the cost of running the city to international standards would reach  annually, while annual revenues average around $12 million. In good years, the CUA is able to reserve $1–2 million to spend on city improvement projects. By 2008, the city's treasury had accumulated 8.2 billion Malagasy ''ariary''approximately in debts under previous mayors. In 2008, water was cut off at public pumps, and there were regular brownouts of city street lights because of 3.3 million ariary of unpaid debts to the Jirama public utilities company by the City of Antananarivo. In response, Mayor Rajoelina undertook an audit that identified and sought to address long-standing procedural irregularities and corruption in the city's administration. The CUA continues to be challenged by a shortage of revenues relative to its expenses caused by the high cost of retaining the large number of CUA personnel, weak structures for managing revenues from public rents and inadequate collection of tax revenues from city residents and businesses.