| 1989.09 1991.08 | | 1991. 08 1996. 04 | | 1996.04 1999.12 | 1999. | 06 | | 1999.12 2001.10 | | 2001.10 2002.05 | | 2002.05 2004.06 | | 2004.06 2009.11 | 2006. | 06 | | | 2009.11 2015. 05 | | 2015. 05 2016. 12 | | | 2016.12 2017.06 | | | 2017.06 2018.04 | | 2018.04 2020.11 | | 2020.11 2021.02 | | | |