| | 1974 1 | 1996 7 2007 4 | | | MBA | | 1996.07 ︱ 1998.05 | | 1998.05 ︱ 2000.05 | | | 2000.05 ︱ 2002.04 | | 2002.04 ︱ 2003.05 | | | 2003.05 ︱ 2004.04 | | | 2004.04 ︱ 2005.04 | | | 2005.04 ︱ 2006.06 | | | 2006.06 ︱ 2007.10 | | | 2007.10 ︱ 2010.01 | | | | 2010.01 ︱ 2012.01 | | | 2012.01 ︱ 2016.03 | | | | 2016.03 ︱ 2018.01 | | | | 2018.01 ︱ 2018.07 | | | | 2018.07 ︱ 2019.03 | | | 2019.03 ︱ | | | | | | | | |