1970s:  For families who can afford it, it is customary for wives not to work outside the home.

1990s: Influenced by economic pressures and a growing insistence on equal treatment for women, the number of two income households increases.

1970: Approximately 3 million women are enrolled in colleges in United States.

1990: Approximately 7.4 million women are enrolled in colleges in the United States.

1970s: The Equal Rights Amendment, a proposal that would add an amendment to the Constitution guaranteeing gender equity, fails to gain enough support to pass into law.

1990s: Despite a much larger presence in the workforce, women still earn only 70