| 1971 8 | 1992 9 | 1994 6 | | 1989.9-1992.7 | | 1992.9-1996.9 | | 1996.9-1998.8 | | 1998.8-2000.3 | 1996.9-1999.7 | | 2000.3-2000.6 | 2000.6-2000.8 | | 2000.8-2002.4 | 2002.4-2003.4 | | 2003.4-2004.3 | 2004.3-2006.8 | 2002.9-2005.7 | | | 2006.8-2007.1 | | | 2007.1-2007.11 | | 2007.11-2011.10 | 2010.3-2010.12 | | 2011.10-2013.1 | | 2013.1-2014.1 | | 2014.1 | | |