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\begin{document}
\begin{tabular}{lr}
\hline
Source & Value\phantom{.} \\
\hline
Signal shapes & $11.5\,\%$ \\
Combinatorial background shapes & $24.6\,\%$ \\
Partially reconstructed background shapes & $6.9\,\%$ \\
Misidentified background shapes & $10.8\,\%$ \\
Efficiencies & $2.5\,\%$ \\
Fragmentation fraction $f_s/f_d$ & $5.8\,\%$ \\
\hline
Total & $30.7\,\%$ \\
\hline
\end{tabular}
\end{document}
