- 1984 - November 15, 1984 Amendments
- 1985 - April 24, 1985 ATM
- 1986 - November 23, 1986 ATM
- 1987 - March 4, 1987 STM
- 1987 - May 27, 1987 ATM
- 1988 - March 23, 1988 STM
- 1988 - October 26, 1988 STM
- 1989 - November 9, 1989 STM
- 1990 - May 23, 1990 ATM
- 1991 - May 22, 1991 ATM
- 1992 - May 27, 1992 ATM
- 1994 - May 25, 1994 ATM
- 1995 - May 24, 1995 ATM
- 1996 - May 22, 1996 ATM
- 1997 - May 28, 1997 ATM
- 1998 - May 27, 1998 ATM
- 1998 - October 14, 1998 STM
- 1999 - May 19, 1999 ATM
- 2001 - October 10, 2001 STM
- 2002 - May 22, 2002 ATM