Youth aged between 18 to 34 years-old account for more than half the total number of registered voters ahead of the August polls. According to IEBC, the age group accounts for 9,930,315 valid voters from the total 19,611,423 registered. Counties whose voting pattern leans towards Raila NASA have the highest number of registered voters with more than 10million (#10MillionPlus or so called #10MillionStrong). see official IEBC tables>> 2017 IEBC VOTER REGISTER. 1. Nairobi – 2,250,853 2.