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2 March–27 September 2006
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28 September 2006–2008
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2008–1 January 2011
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(hiatus from 1 January 2011 to 3 February 2014)
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4 February–21 September 2014
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22 September 2014–10 February 2016
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11 February–9 August 2016
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10 August 2016–12 February 2018
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13 February 2018–present
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