Camping, NCMEC was founded by Congress in 1984; it is run as a private, non-profit organization with resources for individuals, law enforcement, schools and governments. It works in concert with state and government agencies. As a government contractor, it receives $30 million a year from the U. S. government. It handles return of children under the Hague Convention.
Nothing wrong with their statistics, only with their interpretation by those who 'select' data.