\documentclass{article}
\begin{document}
\begin{table}
\small
\centering
\begin{tabular}{c|cc}
Source & Variation up (Stat. up) \% & Variation down (Stat. down) \% \\ \hline 
muR\_muF-ttV\_SR1LBin0\_Incl & 27.4859 & -21.4154 \\ 
muR\_muF-ttV\_SR1LBin1\_Incl & 29.7746 & -18.4034 \\ 
muR\_muF-ttV\_SR1LBin2\_Incl & 31.9245 & -15.8449 \\ 
muR\_muF-ttV\_SR1LBin3\_Incl & 34.4505 & -11.9597 \\ 
muR\_muF-ttV\_SR1LBin4\_Incl & 28.4967 & -23.1626 \\ 
muR\_muF-ttV\_tW1L\_CRtt & 12.4002 & -47.2582 \\ 
muR\_muF-ttV\_tW1L\_CRWp & -8.3237 & -79.1572 \\ 
muR\_muF-ttV\_tW1L\_CRWm & -24.4552 & -108.5198 \\ 
muR\_muF-ttV\_tW1L\_VRtt\_VR1 & 22.2865 & -29.4487 \\ 
muR\_muF-ttV\_tW1L\_VRtt\_VR2 & 31.3862 & -18.1289 \\ 
muR\_muF-ttV\_tW1L\_VRW\_VR1p & -22.5804 & -94.6274 \\ 
muR\_muF-ttV\_tW1L\_VRW\_VR1m & -19.7465 & -90.3694 \\ 
muR\_muF-ttV\_tW1L\_VRW\_VR2p & 27.4409 & -24.4364 \\ 
muR\_muF-ttV\_tW1L\_VRW\_VR2m & 27.783 & -25.9413 \\ 
\end{tabular}
\end{table}
\end{document}
