Although there are about as many women in the world as men, there is a much larger number of men who are heads-of-state.
The only female head-of-state Canada has had, out of 22 in Canadian history, was Kim Campbell. She was prime minister for less than a year, in 1993.
In Africa last month, Joyce Banda became just the third female head-of-state in modern African history.
Banda took over for President Bingu Wa Mutharika in Malawi, who died of a heart attack in early April.
Until then, Banda had been Malawi’s vice-president, elected in 2005.