An international watchdog says people believe corruption has worsened over the past three years according to its worldwide public opinion survey.
Transparency International said on Thursday that its survey of more than 91,000 people in 86 countries and territories shows a quarter say they paid bribes to institutions – the police being the most frequent recipient.
According to the survey, more than 20 countries report significantly more bribery than when asked in 2006.
Views on corruption trends are most negative in North America and Europe where 73 per cent and 67 per cent respectively think corruption has increased over the past three years.
But only five per cent in EU and North American countries report paying bribes while more than 50 per cent in sub-Saharan Africa say they have.
In Switzerland, people perceived the private sector as the most corrupt, followed by the media and political parties.
Half of respondents considered Swiss measures against corruption to be inefficient, double the 26 per cent last year.
swissinfo.ch and agencies