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\begin{document}
\begin{tabular}{lc}
model & cross-section [$ {\rm \,\upmu b}\xspace$]\\
\hline
linear      & $5.17 \pm 0.41$ \\
power law   & $5.26 \pm 0.40$ \\
exponential & $5.38 \pm 0.40$ \\
\hline
average     & $5.28 \pm 0.40 \pm 0.10$  
\end{tabular}
\end{document}
