Chad is ranked last in the World Economic Forum's Network Readiness Index (NRI) – an indicator for determining the development level of a country's information and communication technologies. Chad ranked number 148 out of 148 overall in the 2014 NRI ranking, down from 142 in 2013. In September 2010 the mobile phone penetration rate was estimated at 24.3% over a population estimate of 10.7 million.