Table 1 Prevalence of mental illness, living standards, and income inequality in eight developed countries.

Country	Any mental illness% (95% CI)	Serious mental illness% (95% CI)	GNI per capita US$, purchasing power parity	Income inequality (top 20:bottom 20 ratio)
Belgium	12.0 (9.6, 14.3)	2.4 (1.2, 3.5)	28130	4.5
France	18.4 (15.2, 21.6)	2.7 (1.1, 4.3)	27040	5.6
Germany	9.1 (7.2, 10.9)	1.2 (0.6, 1.7)	26980	4.3
Italy	8.2 (6.7, 9.7)	1.0 (0.4, 1.7)	26170	6.5
Japan	8.8 (6.2, 11.4)	1.5 (0.7, 2.2)	27380	3.4
Netherlands	14.8 (12.0, 17.7)	2.3 (1.1, 3.5)	28350	5.5
Spain	9.2 (7.8, 10.7)	1.0 (0.7, 1.3)	21210	5.4
USA	26.3 (24.6, 27.9)	7.7 (7.0, 8.4)	36110	8.4