Households with valid information in all four waves can be at risk of moving into or out of poverty for one, two or three waves in the UK and for one or two waves in the rest of the countries. Table A1 in the Annex shows the same estimates in non-graphical format). Mean relative income growth rates have been calculated for each base-year decile group. In each period, income growth among children is clearly pro-poor: relative (per cent) income growth is highest in the poorest decile, although the pattern is slightly different for each of the four periods considered. Mean income growth in the poorest decile slowed down over time: it went from 212% between 2008 and 2011 to 122% between 2009 and 2012 and 146% between 2010 and 2013.