| | | | | | | | | | | | | | | | 1971 12 | 1993 10 | 1999 11 | | | | 1989.09 1993.07 | | 1993.07 1993.10 | 1993.10 1994.12 | | 1994.12 2000.12 | | 2000.12 2005.05 | | 2001.09 2003.10 | | | 2005.05 2006.11 | | | 2006.11 2009.12 | | | 2009.12 2012.12 | | 2012.12 2017.10 | | | 2017.10 2018.01 | | | | 2018.01 2019.12 | | | | 2019.12 2020.10 | | | | | 2020.10 2020.12 | | | 2020.12 | | | |