Tsuyoshi is considering three Japanese government bonds with different maturities. Which of the following bonds would offer the highest current yield at a par amount of $1,000?$

$1.$ A $1\%,20-$year bond quoted at $101\mathrm{.}5$

$2.$ A $0\mathrm{.}5\%,$ four$-$year bond quoted at $102\mathrm{.}4$

$3.$ A $0\%,30-$year bond quoted at $99\mathrm{.}8$