\begin{tabular}{rrrrr}
\toprule
$\alpha$ & Rank bound & Design 1 & Design 2 & Design 3 \\
\midrule
0.010000 & 0.010000 & 0.006589 & 0.006592 & 0.006592 \\
0.050000 & 0.050000 & 0.045407 & 0.046015 & 0.046094 \\
0.100000 & 0.100000 & 0.094136 & 0.095167 & 0.096094 \\
0.500000 & 0.500000 & 0.495994 & 0.495602 & 0.496094 \\
\bottomrule
\end{tabular}