| | | | | 1975 3 | 1995 | 12 1997 7 | | | | 1993.09 1997.07 | | 1997.07 1999.04 | | | 1999.04 2001.12 | | | 2001.12 2004.12 | | | 2004.12 2008.01 | 2005.09 | 2010.07 | | 2008.01 2011.04 | 2010.09 | 2011.01 | 2011.04 2014.01 | | 2014.01 2015.07 | | 2015.07 2018.12 | | 2018.09 2018.12 | | 2018.12 | | 2020.06 | |