Economy has mushroomed in Queen's reign
The UK economy is around four times bigger now than when Queen Elizabeth II came to the throne in 1952, according to a firm of business advisers.
PricewaterhouseCooper's Jubilee Budget also established that average incomes now are more than three times higher in real terms than in 1952, growing from £7,500 to £24,700.
Overall the worth of the UK economy has mushroomed from £377bn to £1,561bn through Her Majesty's reign.
Dr Esmond Birnie, PwC's chief economist in Northern Ireland, said the income rise was a "major achievement" which challenged the received wisdom the post-1952 period was a time of economic decline.
Tax as a share of national income had only edged up, from 36% of GDP to 38%, but government spending habits had changed drastically.
"The share of defence spending fell from around 25% in 1952 to only 5% today - although, in both years the UK was at war, Asia-Korea then and Afghanistan now - with corresponding rises in welfare spending on health, education, pensions and other social security benefits," Mr Birnie said.
"But with little scope to cut defence spending further there is a real challenge as to how we pay for further rises in public spending on health and pensions for an ageing population, without significant further increases in the tax burden."