1Today we will examine population data collected over the last three decades.
2In nineteen ninety one, the city had just over two million residents.
3By two thousand and one, that figure had risen to two point six million.
4The most recent census counted approximately three point four million people in total.
5That represents a steady growth rate of nearly fifteen percent per decade overall.
6Roughly twenty two percent of residents are under the age of eighteen.
7The average household size has fallen from three point one to two point four.
8Over forty percent of homes are now occupied by one person alone.
9Population density in the city centre reaches eight thousand people per square kilometre.
10The southern district of Ockenden, spelt O-C-K-E-N-D-E-N, grew fastest of them all.
11It added around one hundred and twenty thousand residents in fifteen years.
12For your essay, compare these figures with at least two other European cities.