| | | | | | | | | | | | | | | | | | | | | | | 1968 7 | | | 1988.08 1995.09 | | 1995.09 1997.08 | | 1997.09 2002.04 | 2002.04 2005.04 | | 2005.04 2008.10 | | 2008.10 2010.04 | | 2010.04 2012.03 | | 2012.03 2017.12 | | | 2017.12 | | |