\begin{table}%t6
\caption{\label{tab6}Quicklook IVM subset: Pearson correlation coefficients between $D_{\rm 2d}$ and $D_{\rm 3d}$ for the potential and the NLFF cases.}              
%\centering
\par
\begin{tabular}{c c c c}       
\hline \hline            
Extrapolation  & Used 3d     & Correlation & Corresponding   \\    
Method & criterion  & with $D_{\rm 2d}$& Probability   \\    
\hline                       
   Potential & $G_{\rm av}$ & 0.765 & 93\%\\
   NLFF with preprocessing & $G_{\rm av}$ & 0.238 & 65\%\\
   NLFF with preprocessing & $C_{n}$ & 0.099 & 30\%\\
\hline                                   
\end{tabular} 
\end{table}