\begin{table}

\begin{tabular}{l|l|l|l|l|}
\cline{2-5}
&\multicolumn{2}{|c|}{Within-Company}&\multicolumn{2}{|c|}{Cross-Company} \\ \cline{2-5}
&      Raw& Logging& Raw& Logging \\ \hline\hline
Ridor& 6.1&  6.4&    10.9&17.3 \\ \hline
jRip&  3.1&  2.9&    13.4&13.4 \\ \hline
Clump&   3&    3&       3&   2 \\ \hline
\end{tabular}

\caption{Number of conditions}\label{tbl:numberOfConditions}
\end{table}
