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3 October 2006–4 March 2007
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5 March–31 August 2007
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1 September 2007–2 March 2008
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3 March–17 September 2008
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18 September–24 December 2008
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25 December 2008–1 March 2009
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1 April–14 May 2009
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15 May–30 August 2009
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31 August–19 December 2009
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20 December 2009–31 January 2010
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1 February–28 May 2010
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29 May–10 June 2010
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11 June 2010–28 February 2011
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28 March–5 June 2011
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6 June 2011–8 September 2013
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9 September 2013–28 February 2014
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1 March–31 May 2014
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1 June–31 August 2014
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1 September–30 November 2014
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31 December 2014–11 January 2015
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12 January–16 February 2015
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17 February 2015–7 September 2018
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8 September–16 October 2018
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17 October 2018–20 October 2019
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21 October 2019–present
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