\begin{table}%t9
%\centering
\par
\caption {\label{tab:grade_shallow}Grade distributions of candidates in the shallow catalogues
upper part refers to all candidates and the lower half for the
high-redshift sample with $z\geq0.7$.}
\begin{tabular}{lrrrr}
\hline\hline
Catalogue & A & B & C & D \\ %& total \\
\hline
$i'$-band & 60 (38\%) & 63 (40\%) & 35 (22\%) & 0 (0\%) \\ %& 158\\
$z'$-band & 53 (30\%) & 69 (39\%) & 56 (31\%) & 1 ($<$1\%) \\ %& 179\\
$i'$- and $z'$-band  & 46 (42\%) & 43 (40\%) & 20 (18\%) & 0 (0\%) \\ %& 109\\
$i'$-band only & 14 (29\%) & 20 (41\%) & 15 (31\%) & 0 (0\%) \\ %& 70\\
$z'$-band only & 7 (10\%) & 26 (37\%) & 36 (52\%) & 1 (1\%) \\ %& 70\\
\hline
$z\geq0.7$\\
\hline
$i'$-band & 22 (37\%) & 21 (36\%) & 16 (27\%) & 0 (0\%) \\ %& 59\\
$z'$-band & 25 (28\%) & 32 (36\%) & 33 (36\%) & 0 (0\%) \\ %& 90\\
$i'$- and $z'$-band  & 20 (52\%) & 11 (29\%) & 7 (18\%) & 0 (0\%) \\ %& 38\\
$i'$-band only & 2 (10\%) & 10 (48\%) & 9 (42\%) & 0 (0\%) \\ %& 21\\
$z'$-band only & 5 (10\%) & 21 (40\%) & 26 (50\%) & 0 (0\%) \\ %& 52\\
\hline
\end{tabular}
\end{table}