The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

Women in 1970 earned on average 52 cents for every dollar a man earned. By 2007, women earned 71 cents, a great improvement. But that's not likely to grow much as long as a greater percentage of women work in lower-paying fields and more women than men leave the workplace for periods to raise children.
Women generally earn （） than men.