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\begin{document}
\begin{tabular}{lr}
    Source                           & Uncertainty ($\%$)  \\ \hline
    Statistical               & $0.39$ \\ \hline
    Trigger efficiency        & $  0.07 $          \\
    Identification efficiency & $  0.23 $         \\
    Tracking efficiency       & $  0.53 $           \\
    FSR                 & $  0.11 $                \\
    Purity              & $  0.22 $                 \\
    GEC efficiency            & $  0.26 $                  \\ \hline
    Systematic               & $0.68$                         \\ \hline
    Beam energy          & $1.25$    \\
    Luminosity          & $1.72$    \\ \hline
    Total                & $2.27$
  \end{tabular}
\end{document}
