More than half of China’s adult population is either overweight or obese, according to a new government report released Wednesday.

Obesity rates in China have doubled within two decades, and health authorities are warning of a surge in chronic diseases such as diabetes, hypertension and cancer.

A new government report found that 34.3% of adults were overweight and 16.4% were obese. (The survey looked at a group of 600,000 Chinese residents between 2015 and 2019.) By comparison, 30% of Chinese adults were overweight and 11.9% obese in 2012, according to a government survey released in 2015.