Problem 9-19 Risk versus Return in Bonds (LG9-2, LG9-4) Table 9.2 Average Returns for Bonds Long-Term Treasury Bonds 0 . 0% 1950 to 1959 Average 1960 to 1969 Average 1970 to 1979 A 1980 to 1989 Average 1990 to 1999 Average 2000 to 2009 Average verage 13.5 9.5 Table 9.4 Annual Standard Deviation for Bonds Long-Term Treasury Bonds 1950 to 1959 1960 to 1969 1970 to 1979 1980 to 1989 1990 to 1999 2000 to 2009 4.9 6.2 6.8 15.1 12.8 10.3 Use the tables above to calculate the coefficient of variation of the risk-return relationship of the bond market during each decade since the 1950s. (Round your answers to 2 decimal places.) Decade CoV 1960s