\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 & 20.331 & -4.3243 \\ 
muR\_muF-Wjets\_SR1LBin1 & 22.7249 & -5.3791 \\ 
muR\_muF-Wjets\_SR1LBin2 & 22.7768 & -6.944 \\ 
muR\_muF-Wjets\_SR1LBin3 & 9.443 & -6.0403 \\ 
muR\_muF-Wjets\_SR1LBin4 & 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 & 10.9309 & 4.6361 \\ 
ckkw-Wjets\_SR1LBin1 & 11.5079 & 6.3541 \\ 
ckkw-Wjets\_SR1LBin2 & 11.0098 & 4.8074 \\ 
ckkw-Wjets\_SR1LBin3 & 11.1499 & 7.6126 \\ 
ckkw-Wjets\_SR1LBin4 & 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 & 13.0819 & 8.0754 \\ 
qsf-Wjets\_SR1LBin1 & 13.9762 & 9.8323 \\ 
qsf-Wjets\_SR1LBin2 & 12.6808 & 8.9173 \\ 
qsf-Wjets\_SR1LBin3 & 12.1398 & 10.3659 \\ 
qsf-Wjets\_SR1LBin4 & 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}
