WASHINGTON — Americans, Japanese and many Europeans are glum about their national economies. By contrast, Chinese, Indians and Australians feel positive about theirs.

Those are among the findings from a survey released Tuesday of 20,132 people in 16 countries by the Pew Research Center. Just 44 percent of Americans rated the U.S. economy as “good,” although that proportion has risen steadily from 18 percent in 2011. Since that year, the U.S. unemployment rate has tumbled from 9 percent to 4.9 percent.

Politics plays a role in how Americans assess their economy: Just 37 percent of U.S. conservatives give the economy high marks, versus 45 percent of moderates and 55 percent of liberals.

China’s economic growth has been decelerating for five years, but 87 percent of Chinese still describe their economy as good. So do 80 percent of Indians and 57 percent of Australians.

People in Japan and in many European countries regard their economies as poor.

No one was more miserable than the Greeks: Just 2 percent rated Greece’s economy as good, versus 97 percent who saw it as bad. No surprise: The Greek economy has shrunk 26 percent since 2007, and unemployment is 23.5 percent.

But within Europe, there were exceptions: Germans, Swedes and Dutch rank their economies highly. European men tend to rate their national economies higher than women do.

The survey was taken from April 4 to May 29, which means that the results emerged before Britain voted June 23 to leave the European Union.