Since then, no opposition leader has ever lost their seat in a general election. Since the beginning of the century, leaders of tiny parties have lost their parliamentary seats 18 times. Between 1918 and 1979, the Liberal Party had seven leaders. The Labour Party had six leaders between 1964 and 1995. An opposition leader is the member of the leadership of his or her party who is not also a member of the government. In many countries, the role is merely a ceremonial one, but in some it is more influential. An opposition leader can influence government policy by voting on legislation before it is brought before the parliament for debate. They may also be able to delay proceedings by bringing forward motions for debates. In many cases, they will be given ministerial posts if their party comes into power, but often they do not become ministers until after an election when they are given roles in which they can exercise political influence. In most parliamentary systems, the leader of the majority party or its equivalent is usually appointed as the prime minister. However, many governments do not follow this process because it would require them to have an agreement on issues such as currency and taxes before they come into office. Instead, a head-of-state may choose a president from among their candidates; or, if there is no presidential election, then they may appoint someone else to serve out the remaining months or years of a former president's term.