In 2014 the Nuffield Trust and the Health Foundation produced a report comparing the performance of the NHS in the four countries of the UK since devolution in 1999. They included data for the North East of England as an area more similar to the devolved areas than the rest of England. They found that there was little evidence that any one country was moving ahead of the others consistently across the available indicators of performance. There had been improvements in all four countries in life expectancy and in rates of mortality amenable to health care. Despite the hotly contested policy differences between the four countries there was little evidence, where there was comparable data, of any significant differences in outcomes. The authors also complained about the increasingly limited set of comparable data on the four health systems of the UK.