Developed regions dedicated almost 2.4 per cent of their GDP to research and development in 2013, while the average for the least developed countries and landlocked developing countries was less than 0.3 per cent. Globally, third-generation mobile broadband covered 89 per cent of the urban population in 2015, but only 29 per cent of the rural population. The number of passengers carried by air transport and the volume of freight are interesting indicators of the dynamism and quality of air transportation.