| 1971 9 | 1992 4 | 1993 7 | 1989. 09 1993. 07 | | 1993. 07 1995. 12 | | 1995.12 1996. 02 | | | 1996.02 1999. 05 | | 1999. 05 2000 . 05 | | 2000. 05 2001. 12 | | 2001.12 2004. 02 | | | 2004. 02 2004. 07 | | | 2004.07 2007.12 | | 2002. 09 2006. 01 | | 2007. 12 2011.09 | | 2011.09 2013. 01 | | 2013. 01 2017.10 | | 2017.10 2020.05 | | 2020.05 2021.04 | | 2021. 04 2021 .05 | | 2021. 05 | | | |