Table $9\mathrm{.}2$ Average Returns for Bonds $$Long$-$Term Treasury Bonds$1950$ to $1959$Average$0\mathrm{.}0\%1960$ to $1969$Average$1\mathrm{.}61970$ to $1979$Average$5\mathrm{.}71980$ to $1989$Average$13\mathrm{.}51990$ to $1999$Average$9\mathrm{.}52000$ to $2009$Average$8\mathrm{.}0$ Table $9\mathrm{.}4$ Annual Standard Deviation for Bonds $$Long$-$Term Treasury Bonds$1950$ to $19594\mathrm{.}9\%1960$ to $19696\mathrm{.}21970$ to $19796\mathrm{.}81980$ to $198915\mathrm{.}11990$ to $199912\mathrm{.}82000$ to $200910\mathrm{.}3$ Use the tables above to calculate the coefficient of variation of the risk$-$return relationship of the bond market during each decade since $1950.$ Note: Round your answers to $2$ decimal places. Problem $9-11$ Risk versus Return in Bonds $($LG$9-2,$ LG$9-4)$

Table $9\mathrm{.}2$ Average Returns for BondsLong$-$Term Treasury Bonds

Table $9\mathrm{.}4$ 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 $1950.$

Note: Round your answers to $2$ decimal places.