Value Added per head was £21,195. This figure is higher than both the Welsh and UK GVA per head at £14,853 and £19,951 respectively, as well as cities including Birmingham, Manchester and Liverpool. Total GVA growth between 1995 and 2007 was 91%. Commuters Out of 197,000 workers in Cardiff in 2008, 126,100 live in the city and 70,900 commute from the surrounding region. 27,100 people who live in Cardiff commute out of the city. Qualifications Overall Cardiff's qualified population consistently outperforms the Wales and UK averages by some distance. This is partly determined by demographics, with Cardiff's relatively young population, and also the existence of a number of universities in the South East Wales region. In 2008, 38.5% of the city's population were qualified with an NVQ4+, compared to 26.5% in Wales and 28.9% in the UK. The proportion of Cardiff's working age population with no qualifications is lower than the Wales and UK averages. 11.1% in the city had no formal qualification, compared to 14.1% in Wales and 12.7% in the UK. Cardiff is also particularly highly qualified in comparison with other cities in the UK. 32% of its residents have a degree or equivalent. Of the major cities outside London, only Edinburgh and Brighton have a higher proportion of its working age population with a degree or equivalent. Industry Since the 19th century, a number of differing industries have shaped the city, and continue to do so today. Coal What transformed Cardiff into a big city was the demand for coal required in making iron and later steel, brought to the sea by packhorse from Merthyr Tydfil. The Ironmasters, the proprietors of the smelters in Dowlais and Merthyr, wanted to reduce the cost of carrying iron by road to ships berthed in the estuary of the River Taff at Cardiff. They sought permission of Parliament to build a long canal from Merthyr (510 feet above sea-level) to the Taff Estuary at Cardiff. Work on building the Glamorganshire Canal began in 1790, took eight years and involved installing 50 locks. The Cardiff Sea Lock, which enabled barges to unload iron into seagoing ships, was built at Harrowby Street (Harrowby - a Viking place-name - had been the original Norse trading post in Cardiff). Eventually the Taff Vale Railway replaced the canal barges and massive marshalling yards sprang up as new docks were developed in Cardiff - all prompted by