Prevalence of bribery in Nigeria 2019, by area and gender

The source adds the following information: "The prevalence of bribery is calculated as the number of adult male/female Nigerians who had at least one contact with a public official and who paid a bribe to a public official, or were asked to pay a bribe by a public official, on at least one occasion in the 12 months prior to the survey, as a percentage of the adult male/female Nigerian who had at least one contact with a public official. The black bars indicate the confidence intervals for the prevalence of bribery at 95 percent confidence level. Taylor‐linearized variance estimation is used to calculate the confidence intervals for the prevalence rates."

The source does not provide information on the count and type of the survey.