In 1991, Lagos had a population of 5,725,116 out of a total of 88,992,220 for a percentage share of 6%. By 2006, Lagos had 9,113,605 out of a total of 140,431,790, again for a percentage of 6%. Kano in 1991 had a population of 5,810,470 representing 7% of the total. By 2006 there were 9,401,288 people in Kano, again representing 7% of the total. Every single state followed this pattern.
Lies, Damn Lies and Census Figures (Redux)