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1 November 1969–30 October 1996
(as a TV production company from 1 November 1969 to 8 October 1987 / as a TV channel since 9 October 1987)
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31 October 1996–26 September 1999
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27 September 1999–January 2004
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January 2004–September 2007
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September 2007–5 November 2010
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6 November 2010–31 August 2012
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1 September 2012–28 August 2017
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29 August 2017–31 January 2021
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1 February 2021–present
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