Specifically, the cost for a benefit of $2.50 a day for all older people aged 60 years or over ranges between 0.5 per cent and 2.7 per cent of GDP, the cost being higher for poorer countries, where $2.50 represents a larger proportion of average income. The risk of poverty among older persons has fallen, while poverty rates among young adults and families with children have risen. However, because the initial old-age poverty rates were very high, persons aged 75 years or over remain the group most likely to be poor. People aged 66 to 75 years in contrast, are now no more likely to be poor than the population as a whole.