quintile, or
20 percent, of children when ranked by household income,
adjusted for household size. That adjustment is based … household income in 1991 was as follows: lowest quintile, $12,400; second quintile, $31,600; middle quintile,
$48,700; fourth …. In 1991, AFDC accounted for
42 percent of household income—the largest component
of income—for female-headed low …