July 13, 1990 : 8 percent, from 8.25 percent.

Oct. 29, 1990 : 7.75 percent

Nov. 14, 1990 : 7.50 percent

Dec. 7, 1990 : 7.25 percent

Dec. 18, 1990 : 7.00 percent

Jan. 4, 1991 : 6.75 percent

Feb. 1, 1991 : 6.25 percent

March 8, 1991 : 6.0 percent

April 30, 1991 : 5.75 percent

Aug. 6, 1991 : 5.5 percent

Sept. 13, 1991 : 5.25 percent

Oct. 30, 1991 : 5 percent

Nov. 6, 1991 : 4.75 percent

Dec. 20, 1991 : 4 percent

April 9, 1992 : 3.75 percent

July 2, 1992 : 3.25 percent

Sept. 4, 1992 : 3 percent

Feb. 4, 1994 : 3.25 percent

March 22, 1994 : 3.5 percent

April 18, 1994 : 3.75 percent

May 17, 1994 : 4.25 percent

Aug. 16, 1994 : 4.75 percent

Nov. 15, 1994 : 5.50 percent

Feb. 1, 1995 : 6 percent

July 6, 1995 : 5.75 percent

Dec. 19, 1995 : 5.50 percent

Jan. 31, 1996 : 5.25 percent

March 25, 1997 : 5.50 percent

Sept. 29, 1998 : 5.25 percent

Oct. 15, 1998 : 5 percent

Nov. 17, 1998 : 4.75 percent

June 30, 1999 : 5 percent

Aug. 24, 1999 : 5.25 percent

Nov. 16, 1999 : 5.50 percent

Feb. 2, 2000 : 5.75 percent

March 21, 2000 : 6 percent

May 16, 2000 : 6.50 percent

Jan. 3, 2001 : 6 percent

Jan. 31, 2001 : 5.50 percent