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\begin{document}
  
  \begin{tabular}{lr} 
    \hline
    Source & Value (\%)\\
    \hline
    Datasets & 22.2 \cr
    Error on $B_D$ & 2.1 \cr
    Efficiency & 10.0 \cr
    Resonance  parameters and backgrounds & 7.5 \cr
     $ D^*_{s2}(2573)^{+}$ \xspace width & 0.3 \cr
    \hline
    Total & 25.6\cr
    \hline
  \end{tabular}
  
\end{document}
