Northern Ireland has one of the fastest growing populations in the UK. Since 1980, it has grown by 9.3% and is projected to rise to 1.72 million by 2011. The proportion of the population under 15 is also the highest in the UK and is currently 23.4%, compared to the UK average of 19.3%. The population of the Derry City Council area has grown to 106,635 (+10.9%) of which the rural population accounts for just over 29,000. The growth in the rural population of over 13% is higher than the urban average; this has been affected by some changes in electoral ward boundaries and the growth of some sub-urban area into traditionally rural areas.