Figure 5From: Changes in social inequality with respect to health-related living conditions of 6-year-old children in East Germany after re-unificationTime courses of prevalence of 6-year-old children's home with single oven heating system by parental educational level in East Germany from 1991 to 2000 ('low': less than grade 10, 'middle': grade 10, 'high': more than grade 10);Back to article page