Despite the extension of suffrage to women from 1918 onwards, Parliament today still remains a predominantly male institution. But the situation is slowly changing, as more and more women MPs are elected. Significantly, recent years have also seen the first female Prime Minister, Margaret Thatcher, and the first woman to occupy the ancient and historic post of Speaker, Betty Boothroyd. Miss Boothroyd's election in 1992 required some adjustment to the Speaker's traditional role. She continues to wear the official robes and buckled shoes associated with the Speaker's dress, but has abandoned the traditional wig. In the house, she is addressed as 'Madam Speaker', having once told a member who was uncertain how to address a female Deputy Speaker, 'call me Madam.'