The World Health Organisation (WHO) 2018 Global Report on Alcohol and Health says that, in South Africa, 38.3% of men above 15 years old have never drunk liquor. It also says that 18.5% used to drink, but have now stopped. This means that, in South Africa, 56.8% of men above 15 years old don’t drink.
The report also says that 68% of women above the age of 15 have never drunk liquor, while 12.7% did drink, but stopped. So, altogether, 80.6% of women in South Africa above the age of 15 don’t drink.
So, if we count men and women together, we find that 69% of men and women above the age of 15 don’t drink liquor at all. Therefore only 31% of people in South Africa above the age of 15 drink liquor. This means that less than a third of all people above the age of 15 in South Africa are drinkers.