Sudan is a developing nation that faces many challenges in regard to gender inequality. Freedom House gave Sudan the lowest possible ranking among repressive regimes during 2012. South Sudan received a slightly higher rating but it was also rated as "not free". In the 2013 report of 2012 data, Sudan ranks 171st out of 186 countries on the Human Development Index (HDI). Sudan also is one of very few countries that are not a signatory on the Convention on the Elimination of All Forms of Discrimination Against Women (CEDAW).