Photo by Fedsib

Even though its been three years since President Obama signed the Lilly Ledbetter Fair Pay Act, mandating that men and women receive equal compensation for equal work, there are still wide gaps in pay between genders.

And one place where the difference between what men and women make is most glaring? Congress. Elected officials don’t have to worry about making less or more because of their gender, but, as National Journal reports, when it comes to what staffers make, there are some big differences.

Based in information acquired through the Congressional watchdog website Legistorm, National Journal calculated that, on average, female Republican staffers made $10,000 less than their male counterparts. The average salary for males working for a member of the House of Representatives was about $62,000 in 2011; for females, that figure was about $52,000.

That’s a rate of about 84 cents on the dollar for legislative and political work.

The disparity is better on the Democratic side, but still, there is a disparity. Women working for House Democrats made 97 cents for each dollar earned by their male colleagues. And in the Senate, female staffers earned an average of about $58,000, compared to male staffers who earned an average of about $63,000.

Much of the pay gap, National Journal reports, can be attributed to a wider gender disparity in the highest-ranking staff jobs. Although there are more female staffers than male working on Capitol Hill, a vast majority of the top positions—chiefs of staff, communications and legislative directors, committee directors—are held by men.