We have a database of phone numbers of over 70 million phone-owing Nigerian adults (18+) called The NOI Polls Number Database (NPND) stratified by Gender, Location and Age-group (18+). These are randomly selected and stratified from the millions of adult phone-owing Nigerians. There is currently an ongoing update of these phone numbers database. Numbers are not associated with names or addresses. For each poll, the computer randomly selects a new set of numbers to be called and interviewed.