It is important therefore that countries and specialized regional agencies put efforts to standardize data processes so as to align with internationally accepted norms and standards. Water availability is usually measured as the level of renewable water resources per capita, which is the standard indicator used to express the level of water scarcity (see chapter III). For contrasting figures, see FAOSTAT database, available from http://faostat3.fao.org/home/E (accessed 30 March 2015).