July 1, 1959	.0002
July 1, 1965	.0003
January 1, 1973	.0004
January 1, 1976	.0003
January 1, 1978	.0004
July 1, 1978	.0002
January 1, 1979	.0001
January 1, 1981	.0003
September 1, 1981	.0006
January 1, 1982	.0008
July 1, 1982	.0004
September 1, 1983	.0002
January 1, 1985	.0001
July 1, 1986	.0002
July 1, 1988	.0004
January 1, 1993	.0006
April 1, 1996	.0007
July 1, 1997	.0006
July 1, 2001	.0005
March 1, 2002	.0008
June 8, 2004	.0006
January 1, 2005	.0004
July 1, 2005	.0002
January 1, 2006	.0001
July 1, 2007	.0003
July 1, 2008	.0004
January 1, 2016	.0005
April 1, 2020	.0000
October 1, 2020	.0005