\begin{tabular}{>{\centering\arraybackslash}p{0.2\columnwidth}>{\centering\arraybackslash}p{0.2\columnwidth}>{\centering\arraybackslash}p{0.2\columnwidth}>{\centering\arraybackslash}p{0.2\columnwidth}}
    \hline
	Normal & Other rhythm & AF & Noisy \\
	\hline
	5050 & 2456 & 738 & 284 \\
	\hline
\end{tabular}