In other words, while 69 per cent of children move out of poverty in Norway each year, only 17 per cent do so in Portugal. For instance, Iceland and the UK combine some of the highest exit rates (i.e. one of the lowest rates of remaining in poverty) with some of the highest poverty entry rates in the comparison, suggesting a large degree of mobility in and out of poverty between any two waves over the 2010-2013 period. Persistent poverty is defined by Eurostat as remaining in poverty (with household income below 60% of contemporary median income) in the current year and at least two out of three preceding years.