Women’s parity at age 30, by birth cohort, for 16 different subpopulations in India. The 16 nonoverlapping groups are generated by interacting indicators for north India/south India, rural/urban, Muslim/not Muslim, and no education/some education. The horizontal axis is cohort (year of birth) binned into five-year increments from 1950 to 1989; the vertical axis is the average parity at age 30 of women in that cohort bin. Each thin line represents a different subpopulation; the thick line represents the average for India overall. Source: Demographic and Health Surveys.