The Annual report was released on how national governments are progressing with the fight against human trafficking. The ranking was based on what the governments are doing to help victims and help stop trafficking, information was gathered from embassies, charities, etc.
Tier 1: countries that meet minimum guidelines but are expected to do more
Tier 2: countries that do not meet the minimum standards but are making efforts to meet them
Tier 3: countries that do not comply with meeting the minimum standards to stop trafficking and are not making an effort to stop
Hiliary Clinton presented the report “All countries can and must do more, more humans are being exploited today more than ever"
To read more vist: US expands human trafficking black list MSNBC