Pinsent Masons: UK-based non-domiciled taxpayers contributed £6.57 billion in income tax in 2014/15, an average of £56,589 per non-dom over the year compared to the average of £5,152 collected from the remainder of the population.
Full story: http://www.out-law.com/en/articles/2016/september/non-doms-pay-ten-times-more-in-income-tax-than-average-taxpayer-group/?