Table 9.2 Average Returns for Bonds Table 9.4 Annual Standard Deviation for Bonds Use the tables above to calculate the coefficient of variation of the risk-return relationship of the bond market during each decade since 1950. (Round your answers to 2 decimal places.) \begin{tabular}{|l|l|} \hline \multicolumn{1}{|c|}{ Decade } & CoV \\ \hline 1960s & .. \\ \hline 1970s & \\ \hline 1980s & \\ \hline 1990s & \\ \hline 2000s & \\ \hline \end{tabular}