Gross Value Added (GVA) is the common measure used to identify contributions to the economy within the UK. It is published by the Office for National Statistics (ONS) and measures the contribution by sector, region and sub-region, which is available from ONS website.
In 2006, real estate, renting and business activities produced the most GVA in the region (£18.5 billion). Fishing produced the least (£4 million).