Middle-class households are not immune: on average nearly 9% of mortgaged middle-class homeowners are overburdened by their monthly mortgage payment across OECD countries. Significant numbers of people are homeless: while statistics are difficult to compare, most OECD countries report that 1 to 8 people in every thousand lack regular access to housing. In addition, many households live in low-quality dwellings: 15% of low-income households live in overcrowded dwellings and 14% do not have access to an indoor flushing toilet.