The European Union is the world’s largest source of foreign aid. So when the E.U.’s hurting, a bunch of poorer countries start hurting, too.

A new report from the OECD finds that the euro debt crisis took its toll. Among wealthy countries, foreign assistance dropped 2.7 percent in 2011.

A food distribution center in Somalia run by the Somali Relief, Rehabilitation and Development Organisation. (Ben Curtis/AP)

On the other hand, European countries that weren’t as badly hit by the Euromess upped their contributions. That includes Germany (up 5.9 percent), Sweden (up 10.5 percent) and Switzerland (up 13.2 percent).

The United States, meanwhile, saw its developmental aid drop 0.9 percent last year. But that headline number obscures some shifts, as the country refocuses its resources. U.S. bilateral aid to Africa rose 17.4 percent in 2011, and aid to the least developed countries rose 16.9 percent. (Here’s a more detailed analysis of how the White House wants to rejigger foreign aid programs for fiscal 2013.)

In absolute terms, the United States still provides more development assistance than any other country, at $30.7 billion in 2011. On the other hand, when you look at aid as a percentage of “gross national income,” the most generous countries in the world are still Sweden, Norway, Luxembourg, Denmark and the Netherlands. Here’s a graph showing official development assistance as a percentage of gross national income: