As of 2012, only 26 of the 68 national parks were officially open for tourism, the remaining received some visitors but with limited planning and control (ICMBio, 2012a). According to a survey conducted among protected area managers the same year, almost one-third of protected areas did not receive visitors at all and nearly 50% received fewer than 50 000 visitors a year. In addition, only 17% of protected areas that could receive visitors generated revenue from public visitation, with a slightly higher share for national parks (Semeia, 2012b).14 This seems to be primarily related to the lack of adequate infrastructure and service provision for visitors (TCU, 2013, Semeia, 2012b), as the case of Chapada dos Veadeiros National Park shows (Box 5.9).