APPENDIX 4: DEBENTURE INTEREST RATES

DEBENTURE INTEREST RATES APPENDIX 4

FROM TO RATE

March 1, 1941 May 14, 1950 2.750%

May 15, 1950 March 22, 1953 2.500%

March 23, 1953 July 7, 1953 2.750%

July 8, 1953 May 28, 1954 3.000%

May 29, 1954 August 31, 1954 2.750%

August 9, 1954 August 31, 1954 2.750%

September 1, 1954 December 31, 1954 2.500%

January 1, 1955 June 30, 1955 2.625%

July 1, 1955 June 30, 1956 2.875%

July 1, 1956 December 31, 1956 3.000%

January 1, 1957 June 30, 1957 3.250%

July 1, 1957 December 31, 1957 3.375%

January 1, 1958 June 30, 1958 3.500%

July 1, 1958 December 31, 1958 3.125%

January 1, 1959 June 30, 1959 3.750%

July 1, 1959 December 31, 1960 4.125%

January 1, 1961 June 30, 1961 3.875%

July 1, 1961 December 31, 1961 3.750%

January 1, 1962 June 30, 1962 4.000%

July 1, 1962 June 30, 1963 3.875%

July 1, 1963 December 31, 1963 4.000%

January 1, 1964 December 31, 1965 4.125%

January 1, 1966 June 30, 1966 4.375%

July 1, 1966 December 31, 1966 4.625%

January 1, 1967 December 31, 1967 4.750%

January 1, 1968 June 30, 1969 5.375%

July 1, 1969 December 31, 1969 5.875%

January 1, 1970 June 30, 1970 6.375%

July 1, 1970 December 31, 1970 6.875%

January 1, 1971 June 30, 1971 6.125%

July 1, 1971 December 31, 1971 5.875%

January 1, 1972 June 30, 1972 5.375%

July 1, 1972 December 31, 1972 5.500%

January 1, 1973 June 30, 1973 5.250%

July 1, 1973 December 31, 1973 6.000%

January 1, 1974 June 30, 1974 6.250%

July 1, 1974 June 30, 1975 6.875%

July 1, 1975 December 31, 1975 7.000%

January 1, 1976 June 30, 1976 7.125%

July 1, 1976 December 31, 1976 7.000%

January 1, 1977 June 30, 1977 6.625%

July 1, 1977 December 31, 1977 7.250%

January 1, 1978 June 30, 1978 7.125%

July 1, 1978 December 31, 1978 7.750%

January 1, 1979 June 30, 1979 8.000%

July 1, 1979 December 31, 1979 8.250%

January 1, 1980 June 30, 1980 9.500%

July 1, 1980 December 31, 1980 9.875%

January 1, 1981 June 30, 1981 11.750%

July 1, 1981 December 31, 1981 12.875%

January 1, 1982 December 31, 1982 12.750%

January 1, 1983 June 30, 1983 10.250%

July 1, 1980 December 31, 1980 9.875%

DEBENTURE INTEREST RATES APPENDIX 4

(Cont\'d)

FROM TO RATE

January 1, 1984 June 30, 1984 11.500%

July 1, 1984 December 31, 1984 13.375%

January 1, 1985 June 30, 1985 11.625%

July 1, 1985 December 31, 1985 11.125%

January 1, 1986 June 30, 1986 10.250%

July 1, 1986 December 31, 1986 8.250%

January 1, 1987 June 30, 1987 8.000%

July 1, 1987 December 31, 1987 9.000%

January 1, 1988 June 30, 1988 9.125%

July 1, 1988 December 31, 1988 9.375%

January 1, 1989 June 30, 1989 9.250%

July 1, 1989 December 31, 1989 9.000%

January 1, 1990 June 30, 1990 8.125%

July 1, 1990 December 31, 1990 9.000%

January 1, 1991 June 30, 1991 8.750%

July 1, 1991 December 31, 1991 8.500%

January 1, 1992 June 30, 1992 8.000%

July 1, 1992 December 31, 1992 8.000%

January 1, 1993 June 30, 1993 7.750%

July 1, 1993 December 31, 1993 7.000%

January 1, 1994 June 30, 1994 6.625%

July 1, 1994 December 31, 1994 7.750%

221(G)(4)

July 1, 1980 December 31, 1980 9.375%

January 1, 1981 June 30, 1981 10.875%

July 1, 1981 December 31, 1981 11.625%

January 1, 1982 June 30, 1982 11.625%

July 1, 1982 December 31, 1982 12.500%

January 1, 1983 June 30, 1983 9.750%

July 1, 1983 December 31, 1983 9.375%

January 1, 1984 June 30, 1984 10.500%

July 1,1984 December 31, 1984 12.000%

January 1, 1985 June 30, 1985 10.625%

July 1, 1985 December 31, 1985 10.125%

January 1, 1986 June 30, 1986 9.250%

July 1, 1986 December 31, 1986 7.500%

January 1, 1987 June 30, 1987 7.000%

July 1, 1987 December 31, 1987 8.250%

January 1, 1988 June 30, 1988 8.375%

July 1, 1988 December 31, 1988 8.625%

January 1, 1989 June 30, 1989 8.625%

July 1, 1989 December 31, 1989 8.625%

January 1, 1990 June 30, 1990 7.750%

July 1, 1990 December 31, 1990 8.625%

January 1, 1991 June 30, 1991 8.250%

July 1, 1991 December 31, 1991 8.125%

January 1, 1992 June 30, 1992 7.500%

July 1, 1992 December 31, 1992 7.500%

January 1, 1993 June 30, 1993 6.875%

July 1, 1993 December 31, 1993 6.000%

January 1, 1994 June 30, 1994 5.750%

July 1, 1994 December 31, 1994 7.250%