Women's median pay in the nonprofit sphere remains far lower than that of men in analogous positions—this is news to no one by now. More strikingly, though, the gap only gets worse as the organization gets bigger—or wealthier.

According to new data from GuideStar's annual Nonprofit Compensation Report, female CEOs are paid 9 percent less than men at organizations with budgets not exceeding $250,000. Raise the budget, though, and the disparity balloons to a 21 percent gap at organizations with budgets between $5 million and $10 million. Here's what that data looks like charted:

Salaries are rising faster for men at larger organizations, too—at organizations in the latter category, for instance, salaries rose 3.6 percent for men between 2001 and 2011 and just 3.1 percent for women. 

There's some good news, though. In that same span, the number of female CEOs increased at nonprofits of pretty much any budget size. But—shocker—women are much more likely to lead the smaller organizations. (According to the report, "the majority of organizations with budgets of $1 million or less have women as CEOs.") And outside of the nonprofit sphere, the gap is no less disheartening:

Aspiring nonprofit workers can take heed that Washington, D.C. has the highest salaries of 20 metropolitan areas. Follow the money.

Chart via GuideStar Nonprofit Compensation Report