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\begin{document}
\begin{tabular}{c|c|c|c|c}
\hline
 $k$ & $m_{KK}$ interval (MeV) &  $N_{{\rm sig};k}$& $N_{{\rm bkg};k}$  & $W_{{\rm p};k}$   \\\hline
 1 & $\phantom{0}$988--1008   &  $\phantom{0}251 \pm 21$ &   $1675 \pm 43$  & 0.700  \\
 2 & 1008--1020   &   $4569 \pm 70$ &  $2002 \pm 49$  & 0.952  \\
 3 & 1020--1032   &   $3952 \pm 66$ &  $2244 \pm 51$  & 0.938 \\
 4 & 1032--1050   &   $\phantom{0} 726 \pm 34$ &  $3442 \pm 62$ & 0.764 \\ \hline
\end{tabular}
\end{document}
