In many landlocked developing countries, such as Armenia, Azerbaijan, Kazakhstan and Mongolia, income poverty headcount ratios were less than 2 per cent in 2015. In several least developed countries, including Bangladesh, Bhutan, the Lao People's Democratic Republic and Nepal, the rates of extreme poverty declined by more than 20 percentage points between 1990 and 2015. Papua New Guinea also recorded a sharp fall in the poverty rate, from 64.5 per cent in 1990 to 28.4 per cent in 2015.