A linear regression analysis shows that an increase of US $1,000 in GNI per capita is associated with a 20 percentage point decline in SFU prevalence. Let us assume that this cross-country relationship holds intertemporally for the 13 countries that account for 80 percent of SFU mortality. In the 11 countries other than China and India in figure , it would take about 55 years to reduce SFU prevalence to 50-55 percent and 75 years to reduce SFU prevalence to 10 percent, at a per capita income growth of 3 percent per year. In China and.
