Era
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1950-
1
1953-
1
1958-2018
1
1959-
1
1960-
1
1961-1975
1
1966-
1
1967-
1
1968-
1
1969-
1
1973-
1
1974-
1
1976-2002
1
1977-
1
1978-
1
1981-1989
1
1984-2007
1
1985-
1
1986-
1
1991-
1
1992-1996
1
1995
1
1997-
1
1998-1999
1
2001-2009
1
2001-2010
1
2003-
1
2005
1
2009-2017
1
2011-
1
2012
1
2017
1
2017-
1
2020-
1
Civil War, 1983-2005
1
Civil War, 2011-
1
Siege, 1992-1996
1
Since 1945
1
Since 2020
1
Tiananmen Square Incident, 1989
1
Transfer of Sovereignty from Great Britain, 1997
1