| | 1971 5 | 1996 10 | 1991 8 | | | 1991.08 1995.07 | | 1995.07 1998.07 | | 1998.07 2001.10 | | 2001.10 2002.10 | | 2002.10 2005.10 | | 2005.10 2009.04 | | 2009.04 2012.12 | 2012.12 2015.04 | 2015.04 2017.08 | | 2017.08 2019.03 | 2019.03 | |