According to the latest data, Sri Lanka has 16 Facebook users per 100 people. According to a 12,500 household survey conducted by the Department of Census and Statistics in January-June 2015, Sri Lanka has 11.8 Internet users aged 5-69 years, per 100 people. The wording is a little ambiguous, so it may be possible that it’s 11.8 households with a Internet user, per 100 households.