By some published surveys, Tonga has one of the highest obesity rates in the world. World Health Organization data published in 2014 indicates that Tonga stands 4th overall in terms of countries listed by mean body mass index data. In 2011, 90% of the adult population were considered overweight using NIH interpretation of body mass index (BMI) data, with more than 60% of those obese. 70% of Tongan females aged 15–85 are obese. Tonga and Nauru have the world's highest overweight and obese populations.