\begin{tabular}{cc}
	\resizebox{60mm}{!}{
	\begin{tabular}{|r|c|c|c|c|}
        \hline
        \textbf{key} & \textbf{ties} & \textbf{win} & \textbf{loss} & \textbf{win-loss-at-99\%} \\ \hline \hline
        manualUp & 2 & 4 & 0 & 4 \\ \hline
        nBayes & 3 & 3 & 0 & 3 \\ \hline
        which10 & 4 & 2 & 0 & 2 \\ \hline
        manualDown & 3 & 2 & 1 & 1 \\ \hline
        micro10010 & 4 & 0 & 2 & -2 \\ \hline
        jRip & 2 & 0 & 4 & -4 \\ \hline
        j48 & 2 & 0 & 4 & -4 \\ \hline
	\end{tabular}
	} &
	\resizebox{60mm}{!}{
	\begin{tabular}{|r|c|c|c|c|}
        \hline
        \textbf{key} & \textbf{ties} & \textbf{win} & \textbf{loss} & \textbf{win-loss-at-99\%} \\ \hline \hline
        micro10010 & 5 & 1 & 0 & 1 \\ \hline
        manualUp & 5 & 1 & 0 & 1 \\ \hline
        which10 & 6 & 0 & 0 & 0 \\ \hline
        nBayes & 6 & 0 & 0 & 0 \\ \hline
        manualDown & 6 & 0 & 0 & 0 \\ \hline
        jRip & 6 & 0 & 0 & 0 \\ \hline
        j48 & 4 & 0 & 2 & -2 \\ \hline
	\end{tabular}
	} \\
	Release 4 & Release 19 \\
	&\\
	\resizebox{60mm}{!}{
	\begin{tabular}{|r|c|c|c|c|}
        \hline
        \textbf{key} & \textbf{ties} & \textbf{win} & \textbf{loss} & \textbf{win-loss-at-99\%} \\ \hline \hline
        manualUp & 4 & 2 & 0 & 2 \\ \hline
        which10 & 6 & 0 & 0 & 0 \\ \hline
        nBayes & 6 & 0 & 0 & 0 \\ \hline
        micro10010 & 6 & 0 & 0 & 0 \\ \hline
        manualDown & 6 & 0 & 0 & 0 \\ \hline
        jRip & 5 & 0 & 1 & -1 \\ \hline
        j48 & 5 & 0 & 1 & -1 \\ \hline
	\end{tabular}
	} &
	\resizebox{60mm}{!}{
	\begin{tabular}{|r|c|c|c|c|}
        \hline
        \textbf{key} & \textbf{ties} & \textbf{win} & \textbf{loss} & \textbf{win-loss-at-99\%} \\ \hline \hline
        manualUp & 3 & 3 & 0 & 3 \\ \hline
        nBayes & 6 & 0 & 0 & 0 \\ \hline
        micro10010 & 6 & 0 & 0 & 0 \\ \hline
        manualDown & 6 & 0 & 0 & 0 \\ \hline
        which10 & 5 & 0 & 1 & -1 \\ \hline
        jRip & 5 & 0 & 1 & -1 \\ \hline
	    j48 & 5 & 0 & 1 & -1 \\ \hline
	\end{tabular}
	} \\
	Release 24 & Release 30 \\
\end{tabular}