1970-1986
1986-1995
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2004-2010
January-February 2004
February 2004-2010 (with the email address used until 2007)
February 2004-2010 (without the email address)
2011-2013
2013-2014
2014-2015
2015
2016-2017
2017-2019
2019-2020
2020-2021
2021-present