| | | | | | | | | | | | | | | | | | | | | | | | | | | 1969 1 | 1990 8 1995 6 | | | | | | 1990.08 ︱ 1991.11 | | 1991.11 ︱ 1997.01 | | 1997.01︱ 1999.10 | | 1999.10 ︱ 2002.05 | | 2002.05 ︱ 2002.09 | | 2002.09︱ 2006.05 | | 2006.05 ︱ 2006.09 | | 2006.09 ︱ 2012.05 | | 2012.05 ︱ 2018.09 | | 2018.09 ︱ 2018.11 | | 2018.11 ︱ 2021.07 | 2021.07 ︱ 2021.09 | | | 2021.09 ︱ | | |