| | | 1991.09___1994.05 | | 1994.05___1997.01 | | 1997.01___1998.01 | | 1998.01___2001.08 | | 2001.08___2004.05 | 1998.07___2001.09 | | ) | 2004.05___2006.10 | | 2006.10___2009.06 | | 2009.06___2012.01 | 2007.06___2009.12 | | | 2011.12___ | | | | |