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\begin{document}
 
\begin{tabular}{lc}
\hline
Source & Relative uncertainty [\%]  \\
\hline
BDT efficiency calibration  & 2.5 \\ 
PID efficiency calibration & 1.1 \\ 
Trigger efficiency calibration & 2.3 \\ 
SPD multiplicity (mismodelling) & 0.9 \\ 
Track reconstruction & 0.4 \\ 
Photon reconstruction & 0.1 \\ 
Hadronic interactions  & 1.4 \\
Simulation statistics & 1.6 \\ 
\hline
Total   & 4.3 \\ 
\hline
\end{tabular}
\end{document}
