On 31 October Tanzanians will elect a new President and a 10th Parliament (Bunge). Many of those standing for election served during the 9th Bunge between 2005 and 2010. How did these MPs perform? Did they participate actively and represent their constituencies by asking questions and making interventions, or were they silent backbenchers? Using official Bunge data sources, Uwazi at Twaweza, an organisation that seeks to 'liberate' data and information so as to better inform public discussion, has presented a ranking of the most and least active MPs in Parliament.