| | | 1971 8 | 1992 9 | 1997 10 | | 1988.07 1992.09 | | 1992.09 1996.07 | | 1996.07 1999.11 | | 1999.11 2001.04 | 1997.10 1999.12 | | 2001.04 2001.12 | | 2001.12 2002.11 | | 2002.11 2004.02 | | 2004.02 2005.10 | | 2005.10 2006.06 | | 2006.06 2011.12 | 2008.02 2011.08 | | 2011.12 2016.07 | 2011.03 2013.12 | | 2016.07 2017.10 | | 2017.10 2019.03 | | 2019.03 2021.05 | 2021.05 | | |