As nations around the world celebrate International Women’s Day, the number of countries that have had a female leader continues to expand. But the list is still relatively short, and even when women have made it to power, they’ve rarely led for a long time.

Fifty-six of the 146 nations (38%) studied by the World Economic Forum in 2014 and 2016 have had a female head of government or state for at least one year in the past half-century.

More information: http://www.pewresearch.org/fact-tank/2017/03/08/women-leaders-around-the-world/