The Independent National Electoral Commission, INEC, on Tuesday said 68.8 million people are eligible to vote in February 2015 general elections.
This figure reflects a reduction when compared to the 2011 elections figure of approximately 73. 5 million.
The INEC Chairman, Attahiru Jega, made the announcement at a press conference that followed official publication of the Register of Voters for the 2015 elections at the Commission's headquarters in Abuja, on Tuesday.
Source: http://ereporter.com.ng/index.php/political-news/item/2587-68-8-million-nigerians-eligible-to-vote-in-feb-2015-inec

Though there is no statistics to support my view, just think it should be more than 68.8 millions consing the fact that Nigeria is close to 200, 000, 000, yes I know minus minors still think it should be more than stated numbers Inec mentioned.