From Wikipedia, the free encyclopedia
2 December 1990–31 December 1992
[edit]1 January 2000–2003
[edit]20 June 2005–28 February 2007
[edit]1 March 2007–15 August 2010
[edit]16 August 2010–31 January 2011
[edit]1 February 2011–20 February 2012
[edit]21 February 2012–8 June 2015
[edit]9 June 2015–18 April 2016
[edit]19 April 2016–8 October 2017
[edit]9 October 2017–6 April 2020
[edit]7 April 2020–present
[edit] 
