documentclass{article}
usepackage{multirow,bigdelim}

begin{document}

begin{table}
centering
begin{tabular}{|c||c|c||c|c}
hline
Config Number & k1 & k2 & Pk &  \
hline
1 & 1 & 0 &  X & rdelim}{3}{3mm}[$5% $] \
hline
2 & 1 & 0 &  Y \
hline
3 & 1 & 0 & Z \
hline
hline
4 & 1 & 0 & A & rdelim}{4}{3mm}[$15% $] \
hline
5 & 1 & 0 & B \
hline
6 & 1 & 0 & C\
hline
7 & 1 & 0 & D \
hline
8 & 1 & 0 & E\
hline
end{tabular}
end{table}

end{document}