This is really impressive, given how quickly things have changed. Though "such advances are partly the result of quotas", public opinion may have dramatically shifted:
“The gains for women in politics in various countries have been remarkable, reflecting a broad shift in thinking,” said Marta Lagos, the director of a Chilean polling firm that works throughout Latin America. She said that about 80 percent of people in the region now thought that women should participate in politics, up from about 30 percent in the early 1990s.
The U.S. has some catching up to do.