Which years did military governments rule Pakistan?

Throughout its history, Pakistan has experienced several periods of military administration, which have collectively spanned roughly half of the country's existence. These periods of military rule include:1

• 1958–1969: Following years of political turmoil, President Iskander Mirza abrogated the constitution and appointed General Mohammad Ayub Khan as chief martial law administrator; Ayub Khan subsequently declared himself president.21
• 1969–1971: General Yahya Khan succeeded Ayub Khan as president and chief administrator of martial law following the latter's resignation.31
• 1977–1988: Following the arrest of Zulfikar Ali Bhutto and the dissolution of his government, General Mohammad Zia-ul-Haq took control of the government and imposed martial law, which remained in effect until 1985.415
• 1999–2008: Following a coup d'état that ousted the government of Nawaz Sharif, General Pervez Musharraf assumed power, initially styling himself as chief executive before later becoming president.617