| | | | | | | | | | | 1970 2 | 1995 5 | 1990 7 | | 1986.09 - 1990.07 | | 1990.07-1993.08 | | 1993.08 -1995.08 | 1991.05-1994.06 | | 1995.08-1999.05 | | 1999.05-2000.08 | | 2000.08-2001.02 | | 2001.02-2006.10 | | 2006.10-2007.08 | | 2007.08 -2011.06 | | 2011.06- 2011.12 | | 2011.12 - 2014.11 | | 2014.11 - 2017.09 | | 2017.09 - 2021.04 | | 2021.05 - 2022.01 | | 2022.01-- | |