The OECD (2008) reports that changes in household structure and the age distribution of the population have tended to increase income inequality in most countries but by a small amount: only in Australia, Canada, France, Germany, the Netherlands and the United Kingdom did demographic change contribute to over 20% of the change in inequality. Data refer to all households, irrespectively of the age of the household head. Poverty thresholds are set at 50% of the median income of the entire population.