| | | | | 1988.04-2000.08 | | 2000.08-2002.04 | | 2002.04-2004.03 | 2009.09-2004.12 | | 2004.03-2006.06 | | 2006.06-2010.07 | | 2010.07-2013.01 | | | 2013.01-2016.03 | | 2016.03-2020.01 | | 2020.01-2020.03 | | 2020.03- | | |