Sheryl Sandberg's "Lean In" is fueling a new women's movement that some hope will empower us all to dust off, re-imagine and reclaim the word "feminist." Here's a look at feminism by the numbers.

Women make up 51 percent of the U.S. population and 47 percent of the workforce.

Since the mid-1980s women have outnumbered men in undergraduate university programs.

Women in the U.S. hold 18 percent of senior management positions, lagging behind South Africa (28 percent) Southeast Asia (32 percent), and Russia (46 percent).

Only four percent of women are CEOs. Only 17 percent are board members.

Women occupy 14.3 percent of executive posts at Fortune 500 companies.

Women earn 77 cents for ever $1 a man earns.

8.2 million American women run their own companies, a 50 percent increase since 1997.

Sources: Catalyst, Institute for Women's Policy Research, Grant Thornton IBR 2012