Last June StatisticsSouthAfrica, the government agency that puts out the country's official economic data, admitted it had greatly overstated inflation for several months because of a glitch in measuring rents.
Botswana has the highest rate of recorded attacks - 92.9 per 100, 000 people - but a total of 63 countries don't submit any statistics, including SouthAfrica, where a survey three years ago showed that one in four men questioned admitted to rape.
In five years the number of rhinos killed in SouthAfrica has risen from 13 to 588, according to statistics from Traffic, which monitors the trade in endangered animal parts.