| 1970 9 | 1991 8 1997 | 12 | | | | | 1987.09 1991.07 | | 1991.07 1991.08 | | 1991.08 1997.10 | | 1997.10 2002.06 | | | | 2002.06 2003.05 | | | 2003.05 2003.10 | | | 2003.10 2012.01 | 2006.08 2009.06 | | 2010.01 2012.01 | | | 2012.01 2013.04 | | 2013.04 2014.12 | | | 2014.12 2016.04 | | | 2016.04 2016.12 | | | 2016.12 2017.02 | | | 2017.02 2017.10 | | | 2017.10 2017.12 | | | 2017.12 2020.09 | 2020 .01 | | 2020.09 | | | | | |