| | | | | | | | | | | | | 1972 3 1994 | 8 | | | | 1994.08 1995.08 | | 1995.08 1998.07 | | 1998.07 1999.04 | | | 1999.04 2002.03 | | 2002.03 2006.06 | | 2006.06 2007.01 | | 2007.01 2011.07 | | | 2011.07 2015.06 | | 2015.06 2018.09 | | 2018.09 2020.01 | | 2020.01 2021.01 | | | 2021.01 2021.04 | | | | 2021.04 | |