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\begin{document}
\begin{tabular}{c c c c  c c} 
Source &  $\sigma_{ W\xspace^+\xspace{j}\xspace}$ \xspace &  $\sigma_{ W\xspace^-\xspace{j}\xspace}$ \xspace &  $\sigma_{ Z\xspace\xspace{j}\xspace}$ \xspace &  $ R_{ W\xspace\xspace Z\xspace\xspace}$ \xspace &  $ R_{ W\xspace^\pm\xspace}$ \xspace \\ 
\hline 
Statistical & 0.4 & 0.5 & 1.1  & 1.2 & 0.7 \\ 
\hline 
Muon reconstruction & 1.3 & 1.3 & 0.6  & 0.9 & 0.0 \\ 
Jet reconstruction & 1.9 & 1.9 & 1.9 & 0.0 & 0.0  \\ 
Selection & 1.0 & 1.0 & 0.0 & 1.0 & 0.0  \\ 
GEC & 0.5 & 0.5 & 0.4 & 0.2 & 0.1  \\ 
Purity & 5.5 & 7.0 & 0.4 & 6.0 & 2.5  \\ 
Acceptance & 0.6 & 0.6 & 0.0 & 0.6 & 0.0  \\ 
Unfolding & 0.8 & 0.8 & 0.8 & 0.0 & 0.2  \\ 
Jet energy   & 6.5 & 7.7 & 4.3 & 3.4 & 1.2  \\ 
\hline 
 Total Systematic & 8.9 & 10.7 & 4.8 & 7.0 & 3.3  \\ 
\hline 
Luminosity & 1.2 & 1.2 & 1.2 & -- & --  \\ 
\end{tabular} 
\end{document}
