Since 2000, nearly 2 million more people have access to water in the four principal urban centres in the country; the company has kept the quality of infrastructure high (less than 18% of the water is lost through leaks – one of the lowest in sub-Saharan Africa), improved financial reporting, and increased its annual revenue by an average of 12% (well above inflation). Challenges remain, including difficulties among some customers in paying for services, with the need to rely on international aid to expand its infrastructure. The state-owned, commercially run venture has helped the nation reach its Millennium Development Goal (MDG) targets in water-related areas, and has grown as a viable company.