\documentclass{article}
\begin{document}
\begin{table}
\small
\centering
\begin{tabular}{c|cc}
Source & Variation up (Stat. up) \% & Variation down (Stat. down) \% \\ \hline 
muR\_muF-Wjets\_SR1LBin0\_Incl & 21.3024 & -5.6742 \\ 
muR\_muF-Wjets\_SR1LBin1\_Incl & 21.7305 & -6.2974 \\ 
muR\_muF-Wjets\_SR1LBin2\_Incl & 20.3354 & -7.586 \\ 
muR\_muF-Wjets\_SR1LBin3\_Incl & 17.4486 & -8.4859 \\ 
muR\_muF-Wjets\_SR1LBin4\_Incl & 25.6449 & -11.1348 \\ 
muR\_muF-Wjets\_tW1L\_CRtt & 35.8844 & -1.8735 \\ 
muR\_muF-Wjets\_tW1L\_CRWp & 13.0788 & -5.3502 \\ 
muR\_muF-Wjets\_tW1L\_CRWm & 12.849 & -6.0169 \\ 
muR\_muF-Wjets\_tW1L\_VRtt\_VR1 & 31.3103 & -5.1963 \\ 
muR\_muF-Wjets\_tW1L\_VRtt\_VR2 & 23.0333 & -5.2546 \\ 
muR\_muF-Wjets\_tW1L\_VRW\_VR1p & 15.6102 & -5.9656 \\ 
muR\_muF-Wjets\_tW1L\_VRW\_VR1m & 16.0399 & -5.943 \\ 
muR\_muF-Wjets\_tW1L\_VRW\_VR2p & 15.1902 & -5.1373 \\ 
muR\_muF-Wjets\_tW1L\_VRW\_VR2m & 18.6594 & -3.792 \\ 
ckkw-Wjets\_SR1LBin0\_Incl & 11.2593 & 5.8406 \\ 
ckkw-Wjets\_SR1LBin1\_Incl & 11.404 & 6.3714 \\ 
ckkw-Wjets\_SR1LBin2\_Incl & 11.2582 & 6.3957 \\ 
ckkw-Wjets\_SR1LBin3\_Incl & 11.552 & 8.2738 \\ 
ckkw-Wjets\_SR1LBin4\_Incl & 11.9637 & 8.9507 \\ 
ckkw-Wjets\_tW1L\_CRtt & 12.455 & 6.0752 \\ 
ckkw-Wjets\_tW1L\_CRWp & 11.0578 & 4.3008 \\ 
ckkw-Wjets\_tW1L\_CRWm & 10.9272 & 3.4064 \\ 
ckkw-Wjets\_tW1L\_VRtt\_VR1 & 11.0877 & 6.0773 \\ 
ckkw-Wjets\_tW1L\_VRtt\_VR1 & 11.0877 & 6.0773 \\ 
ckkw-Wjets\_tW1L\_VRW\_VR1p & 10.9452 & 5.8399 \\ 
ckkw-Wjets\_tW1L\_VRW\_VR1m & 11.0355 & 5.6497 \\ 
ckkw-Wjets\_tW1L\_VRW\_VR2p & 11.4496 & 5.4572 \\ 
ckkw-Wjets\_tW1L\_VRW\_VR2m & 11.5931 & 5.4815 \\ 
qsf-Wjets\_SR1LBin0\_Incl & 13.339 & 9.3141 \\ 
qsf-Wjets\_SR1LBin1\_Incl & 13.4523 & 9.8601 \\ 
qsf-Wjets\_SR1LBin2\_Incl & 12.7171 & 9.899 \\ 
qsf-Wjets\_SR1LBin3\_Incl & 12.7601 & 11.0599 \\ 
qsf-Wjets\_SR1LBin4\_Incl & 13.3951 & 11.7703 \\ 
qsf-Wjets\_tW1L\_CRtt & 14.0578 & 9.979 \\ 
qsf-Wjets\_tW1L\_CRWp & 11.5535 & 8.5687 \\ 
qsf-Wjets\_tW1L\_CRWm & 11.291 & 7.9085 \\ 
qsf-Wjets\_tW1L\_VRtt\_VR1 & 13.2221 & 9.1608 \\ 
qsf-Wjets\_tW1L\_VRtt\_VR2 & 12.5812 & 8.1402 \\ 
qsf-Wjets\_tW1L\_VRW\_VR1p & 12.0942 & 9.4638 \\ 
qsf-Wjets\_tW1L\_VRW\_VR1m & 12.1769 & 9.4276 \\ 
qsf-Wjets\_tW1L\_VRW\_VR2p & 12.1666 & 9.5053 \\ 
qsf-Wjets\_tW1L\_VRW\_VR2m & 12.3736 & 9.7035 \\ 
\end{tabular}
\end{table}
\end{document}
