Asian countries are ageing fast, faster than the rate experienced by OECD countries. The percentage of old people in the population has been doubling in the space of 25–30 years in Korea, Thailand and China, whereas this has taken 50–120 years in OECD countries. Sri Lanka expects that its population over 60 years old will double in less than 20 years: the share of the over-60s in its population will rise from 10% in 2000 to 18% in 2020 and 27% in 2040.