\documentclass{article}
\begin{document}
\begin{table}
\small
\centering
\begin{tabular}{c|cc}
Source & Variation up (Stat. up) \% & Variation down (Stat. down) \% \\ \hline 
muR\_muF-Zjets\_SR1LBin0\_Incl & 7.6601 & -8.7226 \\ 
muR\_muF-Zjets\_SR1LBin1\_Incl & 7.5838 & -3.8436 \\ 
muR\_muF-Zjets\_SR1LBin2\_Incl & 4.6845 & -2.3825 \\ 
muR\_muF-Zjets\_SR1LBin3\_Incl & 3.5506 & -1.2173 \\ 
muR\_muF-Zjets\_SR1LBin4\_Incl & 6.1904 & -4.2717 \\ 
muR\_muF-Zjets\_tW1L\_CRtt & 2.8242 & -3.5066 \\ 
muR\_muF-Zjets\_tW1L\_CRWp & 4.2421 & -3.7834 \\ 
muR\_muF-Zjets\_tW1L\_CRWm & 6.078 & -5.2591 \\ 
muR\_muF-Zjets\_tW1L\_VRtt\_VR1 & 6.4009 & -7.7031 \\ 
muR\_muF-Zjets\_tW1L\_VRtt\_VR2 & 4.2689 & -0.0092 \\ 
muR\_muF-Zjets\_tW1L\_VRW\_VR1p & 6.5217 & -5.3079 \\ 
muR\_muF-Zjets\_tW1L\_VRW\_VR1m & 8.3229 & -5.194 \\ 
muR\_muF-Zjets\_tW1L\_VRW\_VR2p & 2.5585 & -0.3247 \\ 
muR\_muF-Zjets\_tW1L\_VRW\_VR2m & 5.2448 & -5.8768 \\ 
ckkw-Zjets\_SR1LBin0\_Incl & -1.6564 & -4.1509 \\ 
ckkw-Zjets\_SR1LBin1\_Incl & -2.8798 & -5.4763 \\ 
ckkw-Zjets\_SR1LBin2\_Incl & -3.8078 & -8.2642 \\ 
ckkw-Zjets\_SR1LBin3\_Incl & -7.003 & -8.4226 \\ 
ckkw-Zjets\_SR1LBin4\_Incl & -5.4686 & -8.0415 \\ 
ckkw-Zjets\_tW1L\_CRtt & -1.8164 & -5.464 \\ 
ckkw-Zjets\_tW1L\_CRWp & -1.2527 & -8.966 \\ 
ckkw-Zjets\_tW1L\_CRWm & 0.1283 & -9.1476 \\ 
qsf-Zjets\_SR1LBin0\_Incl & 0.5533 & -0.9402 \\ 
qsf-Zjets\_SR1LBin1\_Incl & 0.2313 & -0.9802 \\ 
qsf-Zjets\_SR1LBin2\_Incl & 0.8334 & -1.6578 \\ 
qsf-Zjets\_SR1LBin3\_Incl & -1.0533 & -2.3693 \\ 
qsf-Zjets\_SR1LBin4\_Incl & 0.5794 & -0.5369 \\ 
qsf-Zjets\_tW1L\_CRtt & 0.4755 & -0.6813 \\ 
qsf-Zjets\_tW1L\_CRWp & 2.1836 & -0.0337 \\ 
qsf-Zjets\_tW1L\_CRWm & 2.3671 & -1.0838 \\ 
qsf-Zjets\_tW1L\_VRtt\_VR1 & 1.0687 & 0.0509 \\ 
qsf-Zjets\_tW1L\_VRtt\_VR2 & -0.6688 & -4.054 \\ 
qsf-Zjets\_tW1L\_VRW\_VR1p & 1.7919 & 0.098 \\ 
qsf-Zjets\_tW1L\_VRW\_VR1m & 1.3853 & 0.2927 \\ 
qsf-Zjets\_tW1L\_VRW\_VR2p & 0.1316 & -2.392 \\ 
qsf-Zjets\_tW1L\_VRW\_VR2m & 1.2215 & -0.8217 \\ 
\end{tabular}
\end{table}
\end{document}
