| | | 1972 8 | 1994 8 | 1998 10 | | | | | | | | | | | | 1994.08 1996.01 | | | 1996.01 1999.10 | | | 1999.10 2006.12 | | | 2006.12 2010.01 | | | 2010.01 2012.07 | | | | 2012.07 2020.05 | | | 2020.05 2020.09 | | | 2020.09 2021.11 | | | 2021. 11 | | | |