The five counties in Central Kenya account for 3.1 million votes of the 22.1 million registered voters countrywide.
When the figures are added to counties in Upper Eastern Kenya (Meru, Embu and Tharaka Nithi), Rift Valley (Nakuru) and Laikipia - whose voting pattern mirrors those in Central Kenya, the number of votes jump to 5.8 million accounting for 26.1 per cent of the registered voters.