I explain the difference between those figures as being the result of the fact that foreign organizations do not have the capacity, human resources, expertise, or knowledge of the country and society necessary to achieve an appropriate overview of the situation.
We maintain that figure because we are members of the society and live in that society. People can conceal from foreigners things that cannot be concealed from us. We use the same intellectual tools as Mauritanians, unlike the Australians, who do not have the same cultural systems as Mauritanians. That is what explains the difference.
The percentage we cite is accurate. I have proof that it is accurate: the government refuses to allow the survey to be conducted. If the government knew there was no slavery, it would conduct the survey because it would know that no one would discover all these cases of slavery. It refuses to allow the survey to be conducted because it is afraid of the figure that will be revealed to the world.