| | | | | | | | | | | | | | | | 1978 5 1997 9 | 1999 4 | | | 1997.09 2000.07 | | 2000.07 2003.12 | | 2003.12 2006.12 | | 2006.12 2008.12 | | 2008.12 2011.06 | | 2011.06 2014.03 | | 2014.03 2015.06 | | 2015.06 2017.06 | | 2017.06 2020.07 | | 2020.07 2021.07 | | 2021.07 | | |