01/1972 06/1975 0.06 07/1975 01/1976 0.09 02/1976 01/1978 0.07 02/1978 01/1980 0.06 02/1980 01/1982 0.12 02/1982 12/1982 0.2 01/1983 06/1983 0.16 07/1983 12/1983 0.11 01/1984 12/1984 0.11 01/1985 06/1985 0.13 07/1985 12/1985 0.11 01/1986 06/1986 0.1 07/1986 12/1986 0.09 01/1987 09/1987 0.09 10/1987 12/1987 0.1 01/1988 03/1988 0.11 04/1988 09/1988 0.1 10/1988 03/1989 0.11 04/1989 09/1989 0.12 10/1989 03/1991 0.11 04/1991 12/1991 0.1 01/1992 03/1992 0.09 04/1992 09/1992 0.08 10/1992 06/1994 0.07 07/1994 09/1994 0.08 10/1994 03/1995 0.09 04/1995 06/1995 0.1 07/1995 03/1996 0.09 04/1996 06/1996 0.08 07/1996 06/1998 0.09 07/1998 09/1998 0.08 10/1998 03/1999 0.07 04/1999 03/2000 0.08 04/2000 03/2001 0.09 04/2001 06/2001 0.08 07/2001 12/2001 0.07 01/2002 12/2002 0.06 01/2003 09/2003 0.05 10/2003 03/2004 0.04 04/2004 06/2004 0.05 07/2004 09/2004 0.04 10/2004 03/2005 0.05 04/2005 09/2005 0.06 10/2005 06/2006 0.07 07/2006 12/2007 0.08 01/2008 03/2008 0.07 04/2008 06/2008 0.06 07/2008 09/2008 0.05 10/2008 12/2008 0.06 01/2009 03/2009 0.05 04/2009 12/2010 0.04 01/2011 03/2011 0.03 04/2011 09/2011 0.04 10/2011 03/2016 0.03 04/2016 03/2018 0.04 04/2018 12/2018 0.05 01/2019 06/2019 0.06 07/2019 06/2020 0.05 07/2020 03/2022 0.03 04/2022 06/2022 0.04 07/2022 09/2022 0.05 10/2022 12/2022 0.06 01/2023 09/2023 0.07 10/2023 12/2023 0.08