India's annual alcohol intake has increased by 38% from 4.3 to 5.9 litres between 2010 and 2017, according to a Lancet study. Over the same period, alcohol consumption increased in the US from 9.3 to 9.8 litres and in China from 7.1 to 7.4 litres. The estimates suggest by 2030 half of all adults will drink alcohol, the study added.