Death rates by inverted income per capita percentile.

Lines represent the linear trend that fits the annual death rates per 1,000 for selected ages and sex across 20 income groups. A positive slope indicates that mortality decreases with income. In the S1 Appendix, figures for all age groups are provided for both men (S1 Fig in S1 Appendix) and women (S2 Fig in S1 Appendix).