Plymouth's gross value added (a measure of the size of its economy) was 5,169 million GBP in 2013 making up 25% of Devon's GVA. Its GVA per person was £19,943 and compared to the national average of £23,755, was £3,812 lower. Plymouth's unemployment rate was 7.0% in 2014 which was 2.0 points higher than the South West average and 0.8 points higher than the average for Great Britain (England, Wales and Scotland).

Answer this question, if possible (if impossible, reply "unanswerable"): What was the United Kingdom's average per capita GVA in 2013?
£23,755