There is a gender wage gap between women and women in almost every common occupation, according to a new Institute for Women's Policy Research fact sheet.

In fact, the research shows that women only make 77 percent for every dollar earned annually by men and 82 percent of every dollar earned weekly. Women also have lower median earnings than men in all but one of the 20 most common occupations for women. Bookkeeping and auditing clerks account for the occupations where women and men have the same median earnings. For the 20 most common male occupations, stock clerks and order fillers represents the occupations where women earned more than men by 3 percent of median male earnings.

Women who are employed as property, real estate and community association managers see the largest gender earnings gap among all occupations. These women's full-time weekly earnings in 2011 were only 61 percent of men in the same occupations for $728 compared to $1201 per week. Of the 20 most common occupations for women, financial managers experience the largest earnings gap at $991 compared to $1,504 for an earnings ratio of 65.9 percent while women who are chief executives see the largest earnings gap at $1,464 per week earned by women compared to $2,122 in the 20 most common occupations for men.