Table 9.2 Average Returns for Bonds Bonds 1950 to 1959 Average 0.0 % 1960 to 1969 Average 1.5 1970 to 1979 Average 5.4 1980 to 1989 Average 13.4 1990 to 1999 Average 9.6 2000 to 2009 Average 8.8 Table 9.4 Annual Standard Deviation for Bonds Bonds 1950 to 1959 4.6 % 1960 to 1969 6.1 1970 to 1979 6.7 1980 to 1989 15.9 1990 to 1999 12.6 2000 to 2009 10.7 Calculate the coefficient of variation of the risk-return relationship of the bond market (Use the above Tables) during each decade since 1950.