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}{c|c|c|} \hline Decade & CoV \\ \hline 1960 s & \\ \hline 1970s & \\ \hline 1980s & \\ \hline 1990s & \\ \hline 2000s & \\ \hline & \\ \hline \end{tabular}